Toyota Truck V6 Misfire Case Study P0302
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- Опубліковано 6 лип 2016
- Another neat case study, featuring a 2000 Toyota Tacoma with the awesome 3.4L V6 Quad Cam engine.
Customer complaint is an intermittent rough running, loss of power, and a check engine light. Let's see if we can catch this truck in the act and 100% verify the fault.
Enjoy! - Авто та транспорт
That video is one of the finest examples of an automotive repair and tutorial video ive seen. You are professional cover all details. I learned so much .I have 98 4runner 3.4L same error code. Man I'm lucky to have the same exact problem.
Nice video Ivan and it's always great when you can catch them acting up. Always glad to see your videos!
Some of the best troubleshooting on UA-cam
Very nice and detailed diagnostic approach good job👍👍
Excellent video of a proper Diag. Cover almost all bases.
Great job. I appreciate your educational videos.
Nice scanner, blue tooth and all. I just purchased my first used Vantage. Can't wait to learn how to use it. With you, Paul and Eric O. I will learn quickly. Just hooking up the meter has been tricky. I'm pretty amazed that a light can turn a driver on. I don't get that but I'm a newbie. :)
Love your case study's man
Awesome diagnostics great 👍 job keep it up thanks for sharing
Great to see a new video. Thanks for sharing as always. Enjoy your trip to ETCG.
Been waiting for a new video. One of the shops I diag at has the Launch. Got to play with it last week. Love the wireless capability.
Good stuff Ivan.
Great video and information. Thank you!
Nice job Ivan.
Did you ever get the ohm reading with it heated up? Another great one buddy. Your right this is a common issue with these and you laid out the perfect way to Diag it. I love watching your videos. I learn something new every video. I'm honestly kind of shocked that ETCG agreed to let you and Eric O come to the meet up lol. Don't embarrass him to bad. Lol.
hey there Ivan,was wondering wat happen to u...been awhile...haha always great to see u and ur master diagnosis...awesome video my friend...
Thanks Joe, I was busy collecting more cool video footage, but then got too busy to make videos haha
fantastic video , thanks for sharing!
Great video, helped me a Lot, thanks
Great scope work thanks
Excellent video, thanks
thank you very good demo... kudos my brother
great case study Ivan
Thanks Michael, glad you enjoyed it!
Ah, the legendary 3.4! Wonderful engine. Nice view out your window. Maybe you should analyze that particular injector, if everyone says it fails. Maybe too much heat for too long, maybe just fouled and expanding metal seizes up injector. Maybe a bottle of Gum Out fuel system cleaner. Hope you’re liking the new job!
Best v6 ever
In process of picking right equipment you have some nice stuff
Well, thank you,,learned a lot..
Hi Ivan. How is that new scanner comparable to the Verus as far as scanning features?? Is it better than the autel I have seen you use on previous videos?? By the way, excellent diagnostic.
This was a great vid, very through. I ended up replacing all my injectors with eventually the same 302 code on cylinder 2. I'm still looking into it.
Great video bud, you hit all the areas needed to properly 100% percent diagnose the problem, well done. Can you tell us a a lil more about that scan tool you got there. Also how did you and Erics bike race go, any footage? Btw thanks for taking the time to make the videos i know they are a lot of work sometimes even more than the repair of the car...lol
Awesome this is precisely what my 02 4 runner is doing. It randomly misses but super rarely and in my case it’s not causing a CEL. it’s happened twice now in about 1,800 miles. I’m sure it’ll get worse just hopefully not before spring when it can be down all summer if need be as I have a Mach 1 to drive.
did you replace the other injectors hidden under the intake manifold while you were there? Did you go aftermarket or oem?
Just replaced the #2 with a reman OEM.
Hi Ivan did you have a look at the Autel 906 (upgrade of MaxiDas)? Do you feel the X431 is more bang for the buck.Just curious.
Excellent diagnosing Ivan.
I had a misfire on number 5 plug and found it to be just the plug it’s self and replaced all six and wow it’s running great. Truck has 287k on it.
You were perfect on your resistance numbers but they're only perfect at about 68°. Is there a formula for resistance in relation to temp? Just completed this exact job this morning on a tundra. Nice video
Good video. Aren't there any aftermarket injectors that will work?
excellente scope time =) need to make me one of those fuse jumpers for injector current ramps.
hey Ivan,how good are those scanners
Love your troubleshooting and editing. "What about without a lab scope?", Ivan asks. Well, back in the day, we used a STETHOSCOPE and a noid light.
How’d you do that in this case where you can’t get to the injector? Genuinely interested in this case study
So basically you could have removed the hood from the vehicle and had a not parts required fix? Haha glad to see you using a test light and piercing wires! Make Dan proud lol. I was happy to see it finally act up and catch it on the scope. The way it works here is I will have the scope hooked to something for hours, give up, remove the scope then it will act up haha.
But how would they even know it was an injector problem?? A fat guess? And these suckers are $200 a pop so that turns into a really fat guess lol!
Yeah Eric I was about to take it for a spin to get the engine bay nice and toasty. As soon as I close the hood and put it in gear it started misfiring! There's your problem, lady! LOL
motoYam82 aint that the way it works!
@@PineHollowAutoDiagnostics mines acting up at idle when engine cold. So opposite. Still cant figure it out
@@pitchforkpeasant6219 Wouldn't that be an issue with the idle air control? Dirty or bad module?
nice video do you know if the autel maxidas 708 does miss firing count.
Duck for cover Ivan, the haters will string you up for "piercing or "probing" any wire, they just won't understand that sometimes it is the only way it can be done.
I had a bad coil that let moisture get in around the sparkplug which causes a bad misfire and huge loss of power
The resistance check was'nt very definitive.The scope is your only man to visually intercept the problem.Having learned some previous history about injector failure in this model also helps.Landed a nice catch there.
Nice video and nice use of the scope in the diagnostics. Without it, you would only be guessing on that repair. I personally do not like to use only a resistance test as they can easily burn you in diagnosis, unless f course you have an obvious open in that injector. I've used the scope like this many times and always ohm the injectors to see where they are. Most of the time they are very close to spec and still faulty.
Exactly. Thanks for the comment, Joe!
Looks really nice were you live.
hi thx for the video....
hey Ivan, welcome back. seems like ages since last vid
Glad to have you back too!
is that scantool any good?
The injector wire you probed could have been tested at the PCM/ECU connector. You have high dollar diag tools, so pulling the pin and adding an extender and clamp the connection could have avoided the poke. The computer is easy to get to, one bolt and pull the side kick panel (at least in the older pickups). I only hope you sealed the poked wire, if not there could be future problems with that wire.
As for the comment below about disconnecting the injector from the harness, you could have done it at the PCM connector as well since the wiring doesn't splice to anything else and the only common link would be the PCM.
Either way great video, would have liked a part 2 showing the basic steps of replacing the injector (just trying to get a time estimate for myself on a T100 I'm fixing).
Hi Ivan
Glad to see another Video. Can you give alittle more detail on the new test meter or is it to new for a report? Does it have a scope?
Thanks Welcome back.
Only had the Launch for a few weeks. Kicks ass on Euro stuff, OK on other brands. For example it couldn't bidirectionally turn on the fuel pump on this truck, while the Autel and Verus can no problem. They do sell an add-on scope module for the Launch, but I already have the Verus and the PicoScope :)
+motoYam82 when did you get the pico
Thanks Iva
Hope to see more Videos soon.
Ivan, What about a Bad connection upstream(closer to injector) from your test point? :)
I have that exact same problem atm, the only difference is that mine is # 1 injector giving me grief with heat soak, but working just fine when cold.
Cool nice vid buddy...
No technical questions on this one Steve? Or did the professor cover all the bases? :)
Well the resistance check was sketchy LOL . Cold I could see a match with a known good but did you check the resistance on the bad one hot.
Aye where's the verus ? Did it break
Dude i like your Diag skills, man i would love to work with you..
Nice to see you back, Ivan. Considering all of the required labor to replace 1, and all the same age- I would've dropped in all 6 injectors "while in there". Maybe a length of fiberglass header wrap around each would help with the heat? What a poor engine/manifold design to begin with.
If this was an old GM with shorting injectors, absolutely. But one OEM injector for this thing is almost $200! And I've only seen the #2 go bad oddly enough. We'll see if any of the other 5 originals have the same issue...hopefully not!
For what it's worth, after Vanya and I replaced the #2 injector on my '96 4Runner, it's been smooth cruising for the past two years! Don't know how to explain it, but it seems that it is always the #2 that goes.
gtemnykh Maybe they (Toyota) should just throw an extra injector next to the spare tire and jack? ha ha
That's some good real world testing and thanks for bonus material. I always like conclusive endings. Maybe it's just my OCD. haha
But how many of us have a snap on varus?
You don't have to have a verus Its just a labscope that you need.
there are other scope multimeters on the market that are way cheaper that will bring you to the same conclusion
I’m getting the same code and misfire but once the engine heats up on mine, the misfire goes away. It’s worse if I put the vehicle in reverse when still cold.
I replaced on mine bank five 3 times and still get sputtering any ideas
Where are you located
quick question... I have a innova timing light 5568 but my corolla 2006 don't have the connection to the spark plug..how to ?thx
how to what...check for spark?
Is it possible that tiny debris caught in the injector's micro filter could create a fuel blockage? This would explain how the resistance was in spec, and perhaps also why a cold start would run just fine.
No it's an electrical fault 👍
nice scan tool.
What was the ohm reading when the injector malfunctioned?
By the time I had the ohm meter setup it already cooled down and had continuity again! Judging by the completely missing current ramp, looks like it was an open circuit.
Where u at? I have 01 4runner doin same thing
Fucking awesome. Learnt a lot thank you. I'm interested to know why the ignition signal appeared on the trace on scope? Is it simply due to proximity (emf) or us the control wire common to injector & coil persue ?
As a quick test do you ever skip scoping and just switch injectors and coilpacks around to see if the misfire moves cylinder? If the misfire stays with the cylinder, then throw on a scope/ compression etc
Depends on how easy components are to get to. In his test here he literally pulled a fuse, how easy is that? The injector is buried under the intake plenum so not worth pulling it. Plus the scope catches it while running. Sometimes I will swap components on something like a four cylinder COP or the Ford 5.4 because it's so common.
My 02 is misfiring randomly from different coil packs arcing out, replaced one so far the other two are on the list
For more load and faster failures you could have turned the AC on too for more load on the engine. Great video
Hello i have changing cylinder head gasket and know the engine wants start
Got spark and fuiel on the injector
Nice! I like your wiring integrity test; really cool to see that on the scope!
Out of curiosity, have you ever had injector balance issues when only replacing one injector? It's one of those things we've all been warned about, or heard stories about, but I've never actually seen it happen!
The people who warn you about it are probably parts changers who like to "do them all while you're in there" ;)
@@PineHollowAutoDiagnostics I changed all my injectors while i was in there after having misfire cyl no 1. Ran fine for 10 seconds then iac control valve went. Changed that then misfire cyl nos 1&4. Already changed fuel pump, fiel filter, fuel pressure regulator, spark plugs, plug wires, injectors, iac control valve, maf sensor, Toyota coil packs from Toyota dealer, and air filter. Truck runs rough at idle but smooth above 1250 rpm and has smooth power throughout full rpm range under load. Just really rough at idle and then throws codes cyl misfire cyl nos 1&4
@@pitchforkpeasant6219 are 1 and 4 on the same ignition coil?
@@PineHollowAutoDiagnostics yes. 1&4 on same coil pack. Tried 5 different coil packs. Latest one straight from Toyota. I clear code and it isnt a problem unless i let idle drop below 1250 rpm for more than a minute with engine cold. Runs great driving at all rpm ranges. 164000 miles and everything looks original so shootin the parts cannon wasnt an issue. Interesting variable was I thought I had an exhaust leak. Took the cover off and my exhaust manifold was cracked almost all the way around at center between 2&3. Fixed that and replaced my iac control valve per code given. And then, tacoma started throwing the cyl 1&4 misfire codes
@@pitchforkpeasant6219 how do the plugs look?
Quick question sr I have a 2 4l tacoma misfire on cylinder 1 I replace sparkplugs and still wires like 6 month old never replace injectors culdbe bad injector even hearing works??
could be.
Methinks replacing the injectors in the first hour would have gone far to fix the problem. Injectors are considered a serviceable item like sparkplugs.
Seems like a sticking injector. did the owner end up buying a new injector, or just trying to clean out the old one? If he bought one, did he get a brand-new OEM injector, refurb injector, or a cheap generic knock-off?
Since BBB industries stopped offering free diagram access, anybody would suggest a similar service . Appreciate any response
Same cylinder on my 2003
that good idea
How can you get all 6 injectors pulses on the Verus screen by just conecting 1 channel of the scope on the injector #1 feed wire? Thank you for your videos!
Thanks for the comment, Argeny! Watch the first 10 minutes of the video again and take some notes :) I connected two channels; one for the current on the feed fuse to all injectors and ignition coils, the second is a sync on the #1 injector CONTROL wire.
I tested a Injector harness with a Load pro and it worked. Pretty much the same way Ivan did except I just went positive and negative in the connector. Then I watched the amp draw with the Vantage. If you wanted just to check the driver Loadpro could do that too. I have videos on it. Nice job Ivan. Is this the video where your Verus gave you the middle finger like Eric's old Verus?lol.
Now what if you can't get to the connector like in this case? :P
Haha the Verus needs a break once in a while and I wanted to see if the Launch had good data on an older Toyota...got the job done. My Verus gets slow and the scope starts to glitch when it's really hot outside...meltdown mode lol
+motoYam82 Pierce a wire close to the control side of the computer like you did. Pos to batt negative to control. Push button and watch the control and amp flow on the scope.☺
+motoYam82 Shhhhh, don't tell Dan,lol. I understand sometimes you have no choice but to pierce.☺
See you must of gotten a new scanner. The new Autels are bluetooth also. I almost bought a launch but didnt cause was leery on how it worked
Be more leary of Autel. I have both and can assure you that the launch is certainly my go to tool. Coverage is better , tool is faster and has some little secret functions that autel won't touch.
sticking closed injector
do you recall how many miles just curious
Had A 01 Tundra W/ Same Eng.Put 888,875 mls. On It ,Never Had Inj..Go Bad,But Ran Mid.+ Prem.Mixture on Gas ,TOP TIER Brands Only.Book Called For Reg.,But That Eng.Runs Better on Mid.,Prem.,or Blendof Both. Top Tier Gas Will Prevent Most Inj.Problems.Only Prob.I Had Close to This ,Was A Bad Idle Control Sensor,Prob.Not Ur Prob.,As Only 1 Cyl.is OFF the Grid.
Good video, nice information. But man I am anti wire piercing. Only because it causes so many problems due to moisture and corrosion specially if you in the northeast or close to beaches. If you have to pierce a wire then you can use dielectric grease to seal it back up. That may slow corrosion process down.
good idea to check the PCV on these 3.4 motors becouse mine started smoking and had me thinking i had a blown head gasket or cracked head when all it was is a clogged PCV valve and this also causes poor fuel econemy
James Palmer
Lol when you say 3.4 and fuel economy in the same sentence! Glad I get all my gas reimbursement otherwise I’d have less beer money
Was it also overheating?
Sounds familiar, eh? :)
Hi
I need help my car Toyota runner 05 misfire 4 v6 4 liter I Changed new all part s and 0ne ingnition coils 4 ready but some time light come up
Misfire again please help me ideal thanks
I think those have issues with the injector wiring harness. Test, don't guess!
👍
gud day my good people, pls i want to know more about japanies motor
Of the four personality types, I'm betting this guy is an Analytical-Analytical.
O nevermind jus started video lol
I have error code p0303 but on cylinder 3. I replaced the spark plugs, wires, coil packs, and it has new headgaskets. All thats left are the injectors but hopefully that is it…
What did problem end up being
@@pitchforkpeasant6219 it was the injector
@@BigBoyz33 thanks for reply👍👍
What if there is no code.. Only when cold and clears after it runs for a few minutes. They can't find anything wrong.. thanks
Run it until it gets worse! Probably an ignition (pugs/wires) problem.
thanks, I just replaced coils and did the plugs and wires recently.. didnt help. I actually just took it on the highway.. fine for a couple exits and turned around to come home and started bogging down on me.. 45 or so in 4 gear. almost all the way on the gas.. nothing there.. finally kicks back in.. ugh.. No one has been able to figure it out.
@@Ramphonic ever figure out what problem was?
I see two issues here: not using load pro and piercing wires. Both big no no;) Good video and free to watch.
BBB no longer provide wiring diagrams.
I had
Seemed like a lot of minutes looking at squiggly lines on a screen ... probably a handy, useful tool for a pro but ...
You can not measure resistence in circuit. If your multimeter should not have some protection you already had fryed it out because you never inject voltage of any kind on a resistence measuring device. You will kill that device. For correct injector resistence measure you HAVE TO DISCONNECT the harness and measure directly on injector pins. This is not only for injectors. It is for any device. Resistence is always measured OUT OF CIRCUIT. Never let the multimeter receive any voltage on the resistence measure part of it.
What if the injector is under the intake manifold and you can't get to the pins? Don't worry the circuit was in fact disconnected, as the ignition key was OFF :)
thats funny theres a big youtube meet up lol etcg sma sd ya i no he probly not there will probly have alot of stuff to talk about. funny to be there lol i just bought a new gas tank for my old truck n i didnt get to hepl install it oo i was pissed lol going to scholl to be a electrocal enginer tech oya perfict start was all this stuff oya these a sexy all white f150 09 lerite or watever leathrrrrr moon roof for 10gs maybe 9 tax in needs cam phasers in the 5.4 n wheel pressure sencor things omg its sharp new body crew cab hurrrrrrrrrrawwwwwwwwwww thats my deer eating grunt u no when ur in the deep south lol
123456.... 7 1/2
Dlc connerctor 😂 a connector connector
nerd.......ha ha ha ha