Is Your Ford 4.6/5.0/5.4/6.8 Engine Misfiring / Shaking at 45-50 MPH in Overdrive? Then Watch this!
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- Опубліковано 16 сер 2021
- Is Your Ford 4.6/5.0/5.4/6.8 2V, 3V or 4V Engine Misfiring / Shaking at 45-50 MPH in Overdrive? Then Watch this!
If you are driving at 45-50 MPH and you are giving the engine a bit of gas, without forcing a downshift, in overdrive, you are lugging the engine. Often times as the Coil on Plugs (COPs) get corroded, you will start to have a misfire that is not severe enough for a Check Engine Light (CEL). It will however cause a shaking or bucking with your vehicle, that likely goes away when you force a down shift, speed up around 60mph, or shut off over drive. Sound familiar?
This pertains to many vehicles, and often times people mistake the misfire in Overdrive, for a transmission or torque converter issue. While that sometimes is the issue, more than likely, is it that one or more of your Coil On Plugs is corroded. This causes arching and a poor electrical signal to the spark plug, and you get a misfire.
Instead of paying for crappy aftermarket or expensive snake oil "performance" coil on plugs, simply rebuild your good quality OEM coils, for cheap. Clean the connector, and install new springs and boots. You will need to check the availability on a site like Rock Auto for your specific vehicle.
Link to my How-To video is below:
• The Best Coil on Plugs... - Авто та транспорт
Here is the link on how to clean your coil on plugs and SAVE serious money ua-cam.com/video/fsEDqToilQk/v-deo.html
I'm getting this exact issue but I replaced all the plugs with Autolite platinum, and got brand new Motorcraft coils. I got a 10-pack of the coils for a half-decent price and have tried 3 different coils on cylinder 2. That's the one that's misfiring. And 2 different new spark plugs.
I took it to the shop. They had the thing for 4 days and couldn't find the issue. They tried swapping coils, plugs, and even the fuel injectors. Nothing. Still a misfire on 2.
Compression test was good as well. I can't figure it.
You may have some sort of freak thing going on. Forward tech maculoco had a video where there was actually melting in the intake manifold causing a misfire. Never know what it can be.
I'd be interested in inspecting the harness for the coil pack on that cylinder. You could potentially have a bad connector and it is not fully contacting the top of the coil. For that not to move there's either something else going on or there could be a wiring issue there... It's worth checking.
@@3VJohnny Maybe I should spray it out with some brake cleaner.
I would just inspect the connector on your harness to ensure that it's seating properly. Those are the simple things to check because if it's not moving around, then there's something going on with that particular cylinder.
But like I said, there are all sorts of issues that it could be it's just best to start with the easiest things first. Good luck
@@3VJohnny Oh, one more symptom.
It seems to run a bit better when it's cold, but then gets worse once it warms up. Does that sound like an expansion problem with an electrical contact somewhere?
Thanks 3V Johnny!!! This was exactly what was happening to my 5.4L around 45-50 MPH. Replaced the coils and plugs and wow what a difference. The truck runs so smooth now.
Thank you! My 2010 4.6L does the exact same thing, exactly as you described it. I had identified that it was a misfire, but I did not know about the coil and boot kit. Good video too! Straight to the point and clear.
This saved me so much time and money. Truck runs perfect now. I cannot stress my appreciation for this video. You rock
You are most welcome! I'm so glad it helped you
You are the man!!! Under 50 bucks totally fixed that problem !!! Thank you so much for that video!
Glad it worked out for you!
Thats whats going on with my 03 supercrew 2valve 5.4 triton. Replacing them tomorrow and i found this a very useful video . Thanks. Subscribed!👍
I've been looking for the solution to this fix for 6 months. I love you.
I don’t have this prob with my 08 but am saving in case thanks for sharing!
Great information I'm experiencing this issue right now. Thanks in advance.
Cleaned my coils, boots and inside spring (everything seemed clean already) and my miss fire under load went away 🤷 thanks for the tip.
Great info..... I would have never guessed
thank you ive been looking for affirmation and thats it exactly
I had this issue with my Ford F150 and couldn't figure out what the problem was. After watching your video, I replaced my coils and problem was fixed. Thank You, Thank You and Thank You!!!!!
Awesome glad to hear John! So many times the coils can be the culprit of these issues and I'm glad it worked out for you
I was ready to purchase a set of coils to the tune of 329.00 for my 2006 F150 for this SAME ISSUE after I was told it was the coils. I had already purchased 8 plugs to change, and then the night before I was to do this plug change I came upon your video. I went back to OReilly's the next day and asked for a refund for the plugs (8@14.99 each), and used the refund to purchase the coil on plugs kit...40.00. Since I still had 80.00 left from my refund I purchsed a can or Electronics Cleaner, a can of Intake and Carb cleaner and a can of Seafoam and still had 50.00 left over from my refund. Truck finally runs like it should. Excellent video, my friend. Thank you for this information.
I am so glad to hear that! It is certainly worth doing for routine maintenance and while it doesn't necessarily solve every instance of this misfire, it is certainly worth the shot especially if the boots are original. Glad to hear you saved some money 👍👍
Thank you so much for your heroic advice. I got the same issues. And it works.
I did this to my 2008 fx2 5.4 Ford F-150 and the sputtering in overdrive going around 45-50mph went away I was dealing with that issue for alone time now I changed the coil packs the spark plugs still same thing you guys just need to take them apart put some dielectric grease and install it all back how it was and your problem was gone! Thank you
I'm experiencing the exact thing in a 2008 Expedition I just purchased earlier this week. I'm getting the parts together now for a full ignition refresh on the 5.4L and hopefully this fixes the problem.
Dude I literally love you so much
This is so true. My 11 Expy 5.4L was bucking like 3 yrs ag and no engine light (now at 157k miles and still no engine light). 2 local ahole shops I called "yeah bring it in and we'll replace the engine as it's the timing chains. Chains are slapping around causing misfires"...
The blog I found back then was to change the coils as they get old and crack. I got Holley Accels then and sure enough, the bucking CEASED!!! I hadn't realized the Ford coils were likely good as just boots and springs and tossed them out after moving them around 1/2 doz times in the garage :(
Now 3 yrs later and my Expy started bucking again. This AM I pulled off the coils and lubed up the springs and also noted they didn't extend out so pulled them out a little to ensure they contact the plug.
The bucking is GONZO AGAIN!!!!
Tools required are my Ryobi 1/4" impact driver, 7mm socket, 1/4" ratchet, and small extensions for the rear coils.
1/2 hr. Plugs are only 3 yrs old with
Holy s*** dude. Thank you so much. This has been driving me nuts for about a year and i just assumed it was a vacuum leak that would cost more to fix than what my 260k mile Explorer was worth... I searched forever but found this video by chance and now i can finally feel the sweet relief of driving at 40mph with no terrifying misfiring.
It may or may not solve your issue but it is certainly worth checking for sure
Thanks a ton! That worked for my 2006 F150 5.4L. The connectors at the top of the boot were corroded on all. My truck did exactly what you described.
Spot on! My lincoln mkx is doing that...changing plugs and coils this week
Hopefully that takes care of it for you!
Thank I fixed the problem I have this problem thanks again amigo
Thanks for making this video. Today I'm diagnosing my 2006 Taurus SE with the EXACT same issue. I think you may have solved my problem. I'll update soon with a reply vid.
Absolutely! I hope that helps. If all checks well with the coils, and you still have the issue, spark plugs are a likely culprit. Could also be a dirty fuel filter if it's clogged.
A lot of people change spark plugs, and ignore the coil on plugs, and end up chasing other issues. Definitely report back!
Mine does it going up hill and driving a steady speed around 65 mph. Goes away when I step on gas or let off gas
Mine does as well. Getting ready to try this solution. Fingers crossed
Im thinking thats the two piece drive shaft…
@@funnyman1776 any luck at fixing it? I’m having misfires doing the same thing
Did you find a solution?
@@Dximelis it just went away, i didn’t do anything
You described the exact issue I'm having with my vehicle perfectly perfectly. Really thought this fix was gonna be expensive. But thanks to your video I now know what to do. Thanks for the tip 3V Johnny.
I hope that is the fix! There's obviously is a chance that it could be something else but it's always best to start with the simple stuff first
@@3VJohnny A huge shout out to 3V Johnny. You were right. Just finished replacing (all 8) ignition coils, and spark plugs. Truck is running light a champ. None of that horrible shaking while in overdrive. thanks for the tip brother.
Awesome I'm so glad! Since you did both it's very possible it was a combination of those but a tune-up is always one of the first things to do. I'd also clean your mass air flow sensor and your throttle body if you haven't already.
Was your engine light on when this was happening or no? My 2006 e150 van is doing same thing but no engine light..
Nope it almost is never on. That's why I made the video. People scratch their heads on this and sometimes you can have different causes without having an engine light.
I'm so happy I found your video, this not only fixed my 06 Ford F-150 with the 5.4, but also saved me a bunch of money for repair, it's amazing the amount of mechanics/shops that are unaware of this issue with the misfires and had told me it was bad fuel, torque converter, spark plugs, and then replacing the entire coil packs. After watching this video realizing my truck was acting exactly as described. I took it upon myself and purchased 8 coil boots and springs from Advanced Auto and 2 hours time and my truck runs perfect again. Thanks again for making videos and highly recommend UA-cam for reference.
That is what I like to hear! I am so glad you got it taken care of and your truck is running great! It's such an undervalued solution.
hey Kari did you have the engine light on for this? lean code??
2hours? Let's be honest. I've been working on my Ford for years and nothing takes 2 hours to fix. I'll give you a half a day at best
Mate, you've saved me a heap of cash and for that, I thank you very much.
My mechanic, whom I'll never go to again was insisting that it was big bucks to fix, he wanted to replace my torgue converter, fuel pump and possibly my transmission aswell.
The truck runs like new again.
As long as it actually fixed the problem that's a great thing. It's not always the cause and can absolutely be a torque converter and other issues. But this is always the easiest thing to check
@@3VJohnny it certainly fixed the problem. Took a couple of hours and it now runs like new. Thanks again.
Awesome love to hear it! I couldn't tell in your comment if you had done it yet. Happy to help 👍
Thank you. BUT I have an 03 that used to be a DOT truck. It can also run on propane. You guessed it the coil I think is having this problem is the one under the propane system. Took me about 72 hours to change just the plugs. Wish I seen your video first and change the boots too.
Just bought the new coils and spark plugs, wish me luck, 2004, XLT 5.4l
I believe the shutter u feel is converter lock up trying but misfire is causing it to have way less torque which is what ur ecm reads to match speed and torque to tell the converter to lock up. That’s what ur feeling.
Great video! Much appreciate the advise, I will try this. I watched another video and this gentleman said the same thing. Another claimed to be the torque converter and recommended Genuine Ford XL3 friction modifier additive.
I used something similiar for the rear diff as it was making vibrations during turns It helped with the limited slip and fixed the problem btw.
For this however I will order a set of springs for all 8 coils.
Normally when I think of coil misfire I normally think rough Idle but the way you exolained it makes perfect sense. Thanks again, I am subscribing to your channel 👍
Awesome I hope it works out for you! Always worth trying the easy stuff first. And thank you for watching!
Great video
I replaced all 10 spark plugs and coil packs with new ones and it is still happening.
This has been happening to my 2007 f150 5.4. Today I punched it in od on Highway and was really bucking bad but doesn’t happen in slow speeds. I thought it might be water in tank. Not throwing any code’s however the engine light started flashing and got off highway and light never came back on. Hoping it’s coil packs
Great video, wondering if this would apply to a 1998 E150 with the 5.4 Triton..having the same issue...cleaned up ALL the vacuum leaks I could find and it starts and runs pretty well to 40 or so then bogs down..Also if it does do you have a link to the rebuild kit for the coil on the 98 by chance
Hi good video. It makes sense. I had misfired on my Navigator 05. I changed spark plugs on cylinder 1-4,but still misfired but don;t show light while on overdrive speed 30 to 45 on free way after high speed to slow down. I will check on cylinder 5 -8 and clean coils too. Thanks for the good idea.
My pleasure I hope it works for you!
Thank you Sr.
Everything else awesome thank you
I had this symptom as well…but i swapped coil from cyl 3 to cyl 5 to see if it followed and it stayed on 3.
I have a 2007 F150, it revs very well on park but when in Drive, it doesn't go above 2000rpm and stays between 45 and 50 mph. Then the engine starts making a shooting sound. It looks like the transmission is not turning with the engine speed. What do you think about this?
Just had this happen to a 2012 MKZ. My husband put new spark plugs in it and it runs great! We’re pretty sure it had factory plugs in it the whole 211k miles😬
I have the exact explained misfire and issues at the bottom of the gear befor shifting. I had ford do my plugs and then they were fine and now it's happening again. So annoying on a triton 😅
I have a 2000 and an 03 F-150. The 2000 is automatic and the 03 is manual. They have both been having the same problem where at low rpm it begins to vibrate the moment I accelerate but once I hit 3-5k rpm, the truck stops vibrating. This doesn't happen on idle. I appreciate your time if you can help.
Yes bro! My truck do that shaking at like 20 miles an hour while I'm in the city or been stop at an a traffic light, so what do you think it is?
on my 4.6 3v spark plug closest to driver is dirt built up & hardened so i cant even get the socket on tried the pick tool long slim drill bit no luck so far
Hi, what about the fuel rail that blocks access to the coil on plugs?
Does it come on and of easily? Or does it require a lot of work and new O-rings?
Hey man, I have this exact same issue but with my 1990 4.0L Ranger 2wd auto. It has 84k miles. I’m restoring it. The tranny was just redone and then re-looked at after because I kept thinking it was the tq converter. The tranny is good. I put a new gasket kit on the engine and that’s totally sealed and the FULL tune up kit! Mine uses a coil pack. A new battery was also installed but my ranger is STILL doing this issue in OD at 45-50ish mph! However in Regular D, it drives ok. Since I have a coil pack… what would you recommend? Any help is really appreciated. I’m already deep in this restore and this issue is driving me up the wall.
Please help!! Having this same issue. replaced every plug and coil on plug in my 2004 e-150 econoline. still have same issue after new parts!
What would u suggest if someone was experiencing those problems. They got a tune up. The shaking went away for awhile but came right back?
I just had my transmission rebuilt because of bad forward clutches. It shifted fine for a few weeks and developed the dreaded 45-50 mph OD to 3rd shudder which would stop when I let off the throttle. I took it back to the tranny shop and was able to demonstrate the problem but he had no clue what it was. I think he thought it was his work and I get the feeling he did not want to open up the transmission again. Anyways, glad I didn't go nuts and take it to another transmission shop. Dirty coil looks like the answer. It happens when the engine is hot and is more prevalent on hot days so heat is a factor. Since heat affects resistance, it makes sense that heat would cause dirty contact to misfire. I'll report back with my results. Thanks for the video tip.
Got the hearted comment, edited a small error out, and lost the hearted comment. Did not know that was how YT worked. Anyways, my belated report as promised. I found four problems. One coil with corrosion and loose contact which fell out when slinky was removed. One coil with green crust. One very worn spark plug, replaced. One spark plug well that was foiled with debris. Debris was caked in and had to be chipped out and softened with brake cleaner. Debris was heat soaking plug which caused mis-fire. Just finished a couple of days ago and have not had a shudder. Been trying to trigger shudder but seems to be gone now. More miles and time will tell. Anyways, that was an ace suggestion.
Awesome sounds like you found quite a few little issues that were flying under the radar. It really goes to show you how effective it can be to clean them and not be spending upwards of $300-500 for an entire new set. Nice work!
@@3VJohnny True. What bugs me is there were mis-fires under high load which did not set CEL. Had I gotten P0308 or one of the other mis-fire codes, I would have been on it a lot earlier. The other thing that bugs me is how easy it is to misdiagnose ignition problem as something far worse and far more expensive. A dishonest mechanic would have a field day with this.
Thankyou!
I'm having the same issue in my 05 Ford f150 AND my 2012 Ford flex(only difference is that mine can do it in-between 40-55mph). I'm praying this is what's going on. It's crazy that it's happening in both of my vehicles. Will update with the outcomes as I can afford to fix them 😅
Edit: I have been so incredibly worried that the transmission was going in both vehicles (the truck is new) and I was really freaking out until researching and finding this
So did you fix it?
@@surefiremushroomsmicrogreens apparently not
I have a 2002 f150 5.4 2V. runs great for couple minutes and then starts missing skipping then into a dead miss almost. Well I have put a New Fuel pump, New Coil Packs, New fuel injectors, new Spak olugs, new EGR Valve, new Fuel pressure return sensor, new vaccum line from tail lighst to head lights, new INtake, new valvbe cover gaskets, And I am sure I am missin g something. It was showing several codes. Now the service engone soon light is on but it throws ZERO CODES. Yall tell me....Any advice greatly appreciated.
My 07 Sport Trac with a 4.6 3v has been doing exactly this! No stored or pending pcm dtc either. I was worried it was the torque converter. Im going to try thiis and report back.
Its usually the back cylinders (4 and 8) from water intrusion from the crappy cowl drainage. I have seen this on an 06 explorer and my own 07 mustang
Started looking into this because my truck shifts fine no lights but overdrive causes the engine to sputter but it's also got the coil on plug system
It'll work on any coil on plug you can get parts for. Good luck
Thank you for sharing. I’m adding this to my list of maintenance for my 09 f150 King Ranch. Do you mind sharing any advice regarding air leaks or evap leaks? I am chasing P0442 small evap leak for over a year now. Could this leak have anything to do with vacuum from brake booster hose? I’ve replaced canister purge and as well as keep my fuel inlet clean with the funnel every fill up. 5.4 3v with 150k…I’ve had this going for over a year now. Thanks for any feedback as well as making and sharing great content.
My pleasure, thanks for watching! I'm not totally sure to be honest. I would check any hoses related to the EVAP system. Your engine is a bit different than my '04. Not sure if you have the same hoses that connect to the EVAP purge solenoid under the hood. On mine, it's near the brake booster and tends to dry rot. It's worth checking as that could certainly cause leaks.
Could be your exhaust manifold. Mine had a hairline crack and was leaking.
@@anthonygarcia5746 I’ll be damned. That is a common issue on these. Didn’t think to check there.
My truck sucks. Had a coil go bad. Misfire which caused engine shaking esp about 50mph. I was thinking several things were bad simply bc the issues were so bad. But a simple coil replacement fixed all that. Wow
Exactly! It doesn't mean it's always the case as you know, but far too often people think it's transmission or u-joint issue because of how severe the misfires can be. It's always worth checking these first especially if you rebuild them because it's so cheap. It's worth cleaning them when you do your spark plug change intervals.
2004 lincoln town car 60k, put new coils in it and plugs, new fuel filter, new injectors, watched your video grabbed my old coils rebuilt them like you said....still misfires with no engine light around 35-55. It idles like a dream, it burns rubber and accelerates like a dream. Transmission has been flushed, what should i do now. Every shop says get a new car but no. Head gask and block is perfect. Compression perfect.
EGR valve try replacing it.
Same issue on the old 4.6 with 2 coil packs not coil over plug
Hey Johnny I have a Ford F-150 from 20084.6 engine it does the same thing 45 to 50 miles and I'll start to shake any possible remedies I can use thanks man
Makes since since my spark plug gasket leaking into my spark plug cylinder will change it this weekend
I have 2008 f150 lariat. It does jerk around 70-75 mph on freeway going up hill. U think it might be fuel pump? I have no check engine light
4.6 in my marquis is doing this shit.. sounds like I need new plugs or coil. Ty
My 06 f150 is doing this exact thing in speed over 50mph and in overdrive. No check engine light out was able to pull a P0316 code. Any advice?
I found my problem by accident it was the egr solenoid valve. It had identical symptoms to what you were describing
There are many causes that can cause it. This is just one of the many
I just shifted my 2008 into reverse and the whole truck was shaking. Also the fan after being idle for a while does get super loud.
Mine does it still and I have all brand new plugs and wires sometimes it misfires on cylinder 2 and I stuck lean on bank 1 and 2 it doesn't do it as bad if I'm out of overdrive I can't figure it out please help me mine is a 2006 Ford expedition XLT sport 5.4l 3v with 176,488 miles
I have a Ford f250 super duty and the check engine light is on and says number one and number 3 cylinder misfire on a computer so is this the same thing
I have a 97 ford 4.6 it’s doing this exact thing… what’s the name of the part?
Thank you for a delailed video. My 05 150 has those exact symptoms. I've been told that the bolts that hold down the coil packs, occasionally break. Can I lightly soak them with something such as WD40, before removing, to avoid the bolts busting off? I know the plugs on the 5.4, break, and I won't even attempt to pull those out, but to just put new could springs look like the easy fix
It’s not the bolt it’s the plastic tab off the back of the coil itself that breaks off ie not holding it down
I have a 06 exp. I've had this issue twice now. Tune up, new plugs but I knew it could be coil related . I put fuel inj cleaner and it does help but it has never 100% fixed the issue. Ford makes really good vehicles but some of the problems they have with their cars are so ridiculous and one of those problems is the design with these injectors. I drove almost for a whole year with my car bogging like you said. That was like four years ago. Then I changed one of the coils and gave it a tune-up and it fix the problem. But now it's back again. It also happened one other time in like a year ago. I'm going to try to do what you recommend. I have been told by a couple mechanics that if you have these Ford engines with these coils that you should use fuel injector cleaner at least like once every couple months and it can prevent the problem. But I think if you don't use the cleaner religiously you will always have this problem return
I run that every few months as well in my vehicles as well as only run top tier gas. It's so funny because you'll have people that never have an issue. But then there are ones that have these ghost misfires every so often. Hope that takes care of it, but like anything, it can be something else
@@3VJohnny I've always used regular gasoline you think I should start using the good gas
Mine does it at 60 mph almost Every time. I wonder if the speed of the malfunction has anything to do with what coil/bank is malfunctioning? Like if it bogs at 60mph it might be let's say plug#8 and if it bogs at 45mph it may be plug#2. That would be interesting.
Also, just so you know, both times this happened to me, the car sat for ATLEAST 7 days prior to malfunction.
I have 2013 ford transit connect and I replaced the plugs and coils and fuel injectors and throttle body and maf and air filter.. Still does this around 50-60mph
EGR valve
With the problem Galway if I change the spark plugs
my coils and spark plugs are new and still got the same problem ,new alternator and clean the injector and sitll the same ....help
My F150 2006 Truck shakes/vibrates from the rear/bed at 50-60mph...doesn't seem like a firing issue, but I'll try.
I changed the coil and boot new and it still does it ?? Any opinions??
I have put new coils on my truck and still misfiring any clue what could b going on brother?
I have it now that’s why I’m watching this 😂😂😂😂🤦🏻♂️ my 2006 f150 v8 tri with 280k . Is what is fixing it or how to fix it.
I replaced all my coilpacks and plugs but still have a miss, i also put dielectric grease on each spade and on the plug contact side and every connector, but I still have a miss...
Maybe someone knows the answer to this question. I used my powerprobe maestro, which can test the injector circuit, and found that on cylinders 5-8, I would see an occasional Injector On Time drop to as low as 40.1 and even 101. Cylinders 1-4 would stay around 2.78 - 3.00 or so and never drop. I think this shows my occasional miss would be on the control side to the injectors, which could be the pcm? Also, I watched a fordtechmakeuloco video where he shows a #7 cylinder intake roller follower popped off and was cause the misfire there..I assume with my findings this shouldn't be what is causing my miss?
I also verified I had good voltage to each power side of each injector connector. Any ideas? I replaced the fuel driver control module by the spare tire about 1.5 years ago with a doorman, I don't know if a malfunction in it could cause my on time drop or not though.
Bud I'm about to pull my hair our with one I just bought doing exactly exactly the same thing . It sit for 5years. I've had the fuel tank off so many times I can do it with a rock and a stick. I don't know what I'm doing . I've used seafoam x3 heat . And it's just gotten worse. Atleast you gave me somewhere else to go with it
I hope you figure it out! It's certainly worth trying the easy stuff first since often times that is, what it is. But like anything, it certainly could be something more complex, expensive, or involved. Good luck
But how do know which one mine only has 1 coil v6
But I have a 2001 ford mustang v6 3.8 same problem but I have a coil box
What about when it starts up in the morning
Does this apply to 2v 4.6 I have the same issue? Update: I read the description and realized it says 2v great video. I replaced one coil on plug with an AutoZone model because It was misfiring so bad. Now it has less misfire but still have the symptoms you were talking about in this video. Should I swap the AutoZone out?
The only true way to diagnose this, is with a live data called mode 6. You could certainly try swapping it out, but you need to know what cylinder is causing the issue. I would also ensure that your plugs are good and are not damaged in any way or showing signs of carbon tracing.
@@3VJohnny thank you for the help. Your response was very quick and I do appreciate it!
Is there a case or diffrent diagnosis when there's still an issue after replacing or could they just be dirty contact
Absolutely, this is not a one size-fits-all fix. Misfires can be caused by so many different variables. You can't diagnose it through the internet. It's just something easy to check because it's often neglected and people spend hundreds of dollars replacing coils.
Spark plugs and coils are usually worth changing/cleaning...in addition to cleaning the throttle body & mass air flow sensor. But you can have misfires caused by a wide range of items.
01', 170k. Resealed rear end, coils, plugs, intake manifold, fuel filter, temp sensor, thermostat, still shudders. Drained trans fluid and putting new filter in. We will see🤷🏼♂️Sat for 2 yrs before I put her back on the road.
kinda like cleaning old points on old distributors
My problem with a 2010 f150 4.6 3 value was from idle to around 2500rpm the truck shook terribly. Turned out the connection was bad at the mass air flow sensor and until the rpms were way up the air flow sensor was choking the engine
Yep misfires have tons of causes. Glad you found your issue
can it be the spark plugs if not the ignition coils? I changed all coils and it still does the same thing! mine does this between 40-50mph when im gentle on the throttle but when I lay on the throttle it goes smoothly 2008 f150 5.4 for reference
It can be a whole lot of things. The only way you can truly diagnose it is to use mode 6 data, which is real-time data and see where the misfire is coming from. And then you have to do some detective work to track it down. It could be a whole number of things including spark plugs or unrelated.
Great video. I have a 2010 f150..4.6. Do auto stores carry rebuilt kits for the coils and plugs?
Yes some do online. Rockauto.com usually has them
@@3VJohnny I changed out boot coils and springs. Time will tell ..Hopefully that's was the problem..Thanks
Fixed the problem and doesn't do it anymore but now I have a rough idle were it doesn't have a steady rpm band when at rest. Is running on all cylinders with no codes. Any idea why it may be doing that? Replaced coils and plugs and if maybe I messed something up.
EGR valve
I replaced all coils brand new and still have the same problem
Hey 3V Johnny. My 2006 Ford Econoline Van that has 206,000 miles on it does what you're describing.. but there's no engine light on. Will I typically encounter engine light on if it's what you are describing? Also are these Ford e150 known to have problem you're describing? Thank you
EGR valve
Hi was curious if you might know the cause of an issue mine has. It is on a 2010 F150 4.6 3v engine. When going down the highway at 65-80mph the engine light will come on flashing and run like its on 4 cylinders. I pull over shut engine off and restart and light goes out and runs fine again. Might not happen for another week or month. One time I got the light to stay on so I could check it for free at auto zone it came up as P0308 Cylinder #8 Misfire. I then changed all the spark plugs and the number 8 coil. But it did not fix the issue. Was thinking it could be a injector but have not done anything with it since. Any information would be greatly appreciated. It has 157k miles on it. Its been doing this for a few years now.
I wish I could help you but there's so many things that could cause it. It's honestly probably best to bring it to a shop. I would double check your connection going to the coil to ensure it isn't damaged. But I've seen minor issues with that code, a few with clogged cats, to people saying these needed a full top end rebuild.
Pcv boot going into your throttle body on the back of the throttle body
Exactly what mine does. It throws a P0302. Unfortunately though, I've replaced the coil and spark plug with no results. It runs great until I hit 50ish mph at 1500 RPM. At that point it begins misfiring. If I tap the gas pedal I can break through the misfire RPM and it'll run great once I get out of the 1500 range. No one has been able to figure out what's causing it. Several mechanics have tried and failed. I just have to live with it.
What kind of vehicle ?
did u find a solution?
@@peytons1862 Never did. I probably never will. It's still missing. At least it's still running though lol
@@DajiaMurrell 07 Sport Trac with a V8
I have ford excursion v10 6.8. Same problem. So I cleaned up the injectors, new spark plugs, new coils, new fuel filter. Checking in a week, fuel pressure valve and fuel pump. I have a code on the scan tool of de oxigen sensor that also can lid to misfires.
Gonna give it a shot I hope it helps lmao
Hey can't hurt! Good luck
Okay, I have a 4.6 l, it's doing the same thing but it's not the coil or the plugs? Any ideas? Nor a transmission issue.
EGR valve possible
So I have the issue you describe in my 2003 Crown Vic with 76,000 miles. I replaced my plugs, coils/boots, fuel filter, air filter and still have the problem. What are your thoughts on this?
Not really sure as you've checked most items at that point. I would definitely clean the mass air flow sensor and clean the throttle body if you haven't.
Aside from that if there's no code, it's one of those things where you have to have someone else take a look at it. Good luck
Seems like it sat ALOT. Get it figured out?
Ok, but what if I don't have coils? I have plug wires straight to plugs.
I have the exact issue you're talking about - but not the coils.
Unfortunately that's an older setup. This applies to coil on plug ignition systems. I'm not sure if those older systems have contact points to clean. Otherwise you probably just need to replace the components if they're older.