Це відео не доступне.
Перепрошуємо.
Honda-Acura Surging Idle Speed (case study)
Вставка
- Опубліковано 4 сер 2024
- What causes a surging idle speed on a Honda or Acura?
Here, we’re addressing that complaint and what to look for when you run into this symptom. Honda has a unique programmed response to excessive idle speed, resulting in the distinctive Honda idle ‘surge’. Don’t be a parts changer and replace the IAC motor!
Engine Performance Diagnostics chapter 20
Symptoms
- surging idle when warm
Fix
- adjusting the cold fast idle valve
Tests shown
- how to scope test a fuel injector
- understanding how Honda/Acura controls excessive idle speed
- how to measure duty cycle on a computer controlled solenoid
- how to test the electrical IAC solenoid
- understanding common causes of high idle speed conditions
- understanding the operation of a Honda cold fast idle valve
- how to determine if the cold fast idle valve is operating properly
- how to test for a malfunctioning cold fast idle valve at the throttle body
- how to inspect and adjust a Honda cold fast idle valve
Tools used
- lab scope
Playlist
- (Chapter 20) Idle Speed Problems and Testing
• (Chapter 20) Idle Spee...
Related videos
- P0507 Idle Control System (RPM Too High) - vacuum leak - GM
• P0507 Idle Control Sys...
- Ford Idle Air Control (IAC) valve test (how to adjust minimum idle speed)
• Ford Idle Air Control ...
- P0506 IAC System RPM below expected (vacuum leak) - Ford
• P0506 IAC System RPM b...
- Ford idle air control valve (IAC) test - stalling problems
• Ford idle air control ...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
8 years later and this is still the Go to video for all service techs dealing with old ass Honda's.. Truly a testament to scanner Danners knowledge and his journey to the answers.
as soon as you figured out the the cold-fast idle valve was open and you could thread it in I was yelling at my screen saying, "YES! YES! That;s it dude!!" that issue was killing me and I went and did the exact same thing you did! right on brother. thanks for your videos
Thank you, Mr. Danner, for making this video it came to a huge help to me just yesterday dealing with excessive idle problems with my Honda after adjusting the fast idle valve the idle problem has gone away completely. Thank you.
Just bought a second-hand Honda and it had exactly this problem. Thanks for the video it has enabled a fix.
Brother. Hands down, the best and amazingly detailed video on idle (fast idle valve) problems out of the dozens of videos I've come across. Never stop posting these vids man!
Glad it helped!
Thank you so much for this video, I've tried everything to fix my idle problem, from the pcv to the iac and nothing worked. This video helped me and it was easy to understand. I was able to do it in an hour after watching your video. I appreciate it so much, you've earned another subscriber. Keep up the good work!
You are a real Pro ! Many "mechanics" these days make fixing cars really troublesome...Thank God for guys like you that are real Pro's and allso are generous with us help seekers and post issue fix videos on UA-cam . God Bless you and Hello from Romania in 2019. I have same issue with 2002 Toyota Yaris 1.0 4cyl vvti engine . will check tomorrow about this control valve.
Thanks for this video, immediately solved my idle problem! I adjusted the valve to the max bottom and left it there. It's probably only temporary fix, but it will do the job until i buy new one.
So glad I found your video! This video is phenomenal. My SOHC has exact same idle surge. Now I know where to start. Thank you!
Dude so far you have been a great help to me can't thank you enough.
What a master class... man. Thanks for sharing your knowledge, you help a lot of people who own a Honda. Very well explained.
This video is awesome. I found this problem a long time ago but the way you explain it is great. It fills in a lot of blanks.
Great to hear!
You can actually hear it without undoing a bolt, especially with aftermarket air intakes, sounds like a massive vacuum leak! Great video, this should be shared on all those awesome Honda forums.
Great detail with the trouble shooting also good to see exactly why the injectors we're shutting off :)
Excellent! learned so much here! Thanks Paul! Great explaination and investigation! Its not just hondas, this happened to my suzuki g16b motor from a baleno
This fix worked for me. Turned out my diaphragm was backed almost completely out in the valve. Was difficult to screw in. Used a quarter instead of a flat head. Worked great
sweet! thanks for watching and commenting
You are definitely the best. You not only experience but to be honest I give you a A plus for knowledge
Also make sure to check your throttle body gasket as well! They will break overtime and cause it to have a vacuum leak
This is my specific issue, on a 2001 Accord Value Package (like a pimped out DX - not exciting, but hey, almost nothing fancy to break over time). It has the F23A5 non-VTEC engine and the surge is *identical* to this. I was about to swap out the electronic IAC but will look at the Cold Fast Idle Valve tomorrow. I will also look for any obvious vacuum leaks. Not ruling anything out at this point, but am glad you gave me several things to put at the top of my list. Thanks!
just got my first honda and it does the loopy idle thing. im gonna give this a shot, thanks man you've earned a new subscriber !!!!!!
Thank you for this information. I have an Accord that has been do this since I got it. I purged cooling system, cleaned IAC but all it needed was the FITV adjustment!
+tim browning sweet!
I think you were the first one to figure out to adjust that valve all the way down👍👍
had rhis issue this week . i cleaned out pirts with csrb cleaner and it fixed it. but good to know the adjuster is there in case it decides to come back. good work.
This fixed an issue I’ve been having for months, tightened it down and works like new again! Thanks so much!
Awesome
@ScannerDanner great video you’re very educated I love your video, first one I’ve seen but am impressed with the amount of knowledge you give people instead of just summarizing the problem🙏🏼🙌🏻👊🏻
I usually never do this but thank you scannerdanner, after watching this video and having it all explained out, you helped correct my idle issue on my integra. Thank you!!!
Thanks so much! If you need help in the future. Post here:
It is becoming more and more difficult to answer questions here. I have 80,000 people asking me for help now. So I have created a forum to help you guys better. It is free to join and we can exchange pictures, wiring diagrams and waveforms if needed to help guide you through the process of troubleshooting your vehicle. Thank you so much! Hope to see you there.
Paul Danner (ScannerDanner)
www.scannerdanner.com/forum/post-your-repair-questions-here.html
Very well done : ) Thanks for backing up ETCG's results. I now subscribe to both of you : )
thank you so much for the comment and for your support!
Have the same surging issue but on a Mazda B2200 1993. Pretty much did what you did here except you can adjust the IACV without taking anything apart by just adjusting a screw on the outside, it runs so much smoother now. I have been trying to fix this surging issue for almost a month now and my next step was a new IACV which runs between $300-$500 new. Thanks for the video!
Best vid out there had this problem forwver thought i would never fix it thank you so much props to u best vid ever
loving the video, my integra has a surging idle and i think this might be my problem, i had cleaned my idle air control valve and the problem never left so hopefully this can help me tomorrow
Hello scannerdanner I also bought your great book, Ericthecarguy helped me find you and I have watching he's video same problem and he also turned the nut to bottom and now you learned me to diagnose this problem. You are the best teacher I ever seen and great personality easy to listen to. can watch your videos for hours never bored thanks man.
Simple videos are always the best.
Hello ScannerDanner, I just went through the new Section 20 of the E-Book (Engine Performance Diagnostics) Cover to cover and man, I think you nailed it. If anyone has an idle performance issue with an engine, you got the answers. I had an 05 Doge 5.7 Durango with an intermittant stall--NO ONE-- could find the fix. I did. My Friends love it when I read your books.
THANK YOU , FIXED THE ISSUE ON MY 94 CIVIC
I should have seen this video before I decided to do overhaul on my engine Acura Integra damn.. you rock buddy!!! very helpful video ever...
Thanks mate, I did this today and it now idles properly.
Keep up the great work..!!
awesome video. Im actually in the process with the same issue on a Honda Pilot with the exact same surging issue. I also performed the same test covering the hole to the iac valve. and made a world of a difference. So Im going in confident with replacing the iac valve.
BTW, Eric the Car Guy actually has a video explaining how to turn down that adjustment
It touches on the exact component you showed in the video.
Paul,
Outstanding video AGAIN !!
Keep up the great work.
Pete
Hi Paul, Eric the Car Guy had one of these valves on one of his videos, he screwed it right in then undone it about 1/4 turn and it cured hi..so think you done the right thing...I actually thought to start with when it surged it was slowing down and the IAV was opening it up to keep it running, but you proved it was the other way round..good work - Fred.
My 1989 Honda Accord is surging like this. i'm going to try some of the things you show in this video.
One thing that always bothered me on older Hondas is that the TPS is riveted to the throttle body....slightly annoying
And yeah, I've ran into this exact scenario a couple of times.
Another awesome video Paul
Thank you Professor Paul for this case study, I’m having this problem on my ‘03 Honda Odyssey w/3.5l engine. Following Mitchell1 DIY instructions I don’t get to radiator fan coming on point before my TCS light comes on the dash. Will be diving into your book.
Did you get it figured out?
Thanks for your study. Just fixed a 1997 Honda Accord EX VTEC thanks I your instructions.
This is by far the most useful video on the subject. Perhaps one of the most useful videos on you tube. TY.
wow! Thanks so much!
I found it pretty worthless to be quite honest with you. A lot of extremely technical garbage that in real life had no value at all to me. In my case It was a matter of playing with Hondas ridiculously stupid throttle cables, and some bad injectors that finally solved my issues. And still have a surge only in Park. So on with my search for some actual helpful info I guess.
Puppet master I’m having same issue This video was informative but my integra still surging while idling when engine is hot. We’re u bale to fix the issue. Thanks
i love full diagnostic videos! every second was filled with knowledge. keep up the good work! new subscriber!
Awesome, thank you!
ScannerDanner you are of the few analytical thinkers out there. Thank you I have a better understanding now.. Even more than my local mechanic (^^,)
dude your freaking livesaver!!!!!!!!!! i finnally found out what causes my fluctuating idle!! once again thanks a lot !!!!!!
thanks so much!
For real right here with you man I was losing my mind lol
Really nice video Paul, you deserve more attention!
This video is incredibly well done and full of great info. Thanks!
Could have been better in focus on the scope screen but at least it wasn't fighting for autofocus.
Great video bro. Helped so much on my 96 integra ls. Hope to see more from videos from you in the future.
Thanks so much!
thanks jerry! i really appreciate the comment. let me know if there is any other lecture video you would like to view again. I'll open it up for you at no cost.
BTW as a loyal customer, do you think 45 days is long enough for the streaming videos? i was thinking of increasing it
having the same problem on an EK i just bought doing this exact same thing so tomorrow going to try this out and see what happens. Thank you
Thanks ScannerDanner! Was a huge help!
Thank u sir, ur videos have been most helpful on UA-cam auto,... Plez keep making
+marianatequiero28 will do man. Thanks!
Very educational video I learnt a lot from it and me being a Honda enthusiast. Just having a low idle issue on a H series engine that I need to fix. Pretty sure it's the Idle air control valve on the front intake that should be my issue.
IACV.
Which dance for idle air control valve.
That wasn't the cause of my problem it was just a dirty throttle body.
Needed extremely good clean
She runs like a dream now.
I even made my own video on my own personal experience with this problem.
If anyone's interested.😉
This is a very good video.
I wish I had all the hardware to do some testing myself
Seriously I had the same issue about a year ago, it was the iacv. I’m having the same problem again n I want to blame the iacv, but it’s still kind of new. So I’m gonna check the fitv tomorrow. Thanks for the video.
Mitsibishi also has the same issue on their pre DBW engines. I fixed many Eclipse engines that had either a FITV that fell apart internally or an ISC stepper motor with a dead winding that resulted in an idle bounce. What's worse on the Mitsubishi though is that their closed throttle position switch is an external contact switch and it can get stuck in the closed throttle position and leave the idle rev limit engaged... leaving the engine stuck below 1800 rpm and unresponsive to the throttle. Had a few tow ins over the years where they froze in the winter and by time the car got into the shop it thawed and was working again. Usually got water in from a missing rubber cover on the switch.
Scannerdanner you are 'THE MAN'! Me and my neighbor were diagnosing an idle issue on a 97 honda accord. After watching your video it took 5 minutes to determine the cold fast idle valve was the culprit and 20 minutes for the repair. Thanks for the great content scannerdanner!
hi dan, i have a similar problem of idle surging after warm up. main problem is it is a swaped gsr drivetrain and converted to obd1... was very eager to try this but i dont have that system (only one hole, for iac)
have done a smoke test with no findings
it also seems to run rich which could point to coolant temp sensor?
and occasionally will idle normally (and sometimes seem to want to die out when idling 'normally')
basically asking if you have seen similar problem, and or where might be a good place to start?
thanks!
Thank you for making this video.
Very nice video.. This might actually fix my friend's car.. Thanks!
Hi did exactly what you told me to and it work great on a 1998 honda prelude sh type 2.2 vtech engine
I like the comments and feedback! Keep them coming. I looks as though valve replacement would have been the proper fix hear. I will update this in a few months and let you guys know how our "fix" is doing, as this car is owned by one of our students.
Any updates please 🙏
@piksylicious from 9 years ago but yes, this was a fix 😉
@@ScannerDanner I have a 2004 honda jazz, in Australia. The IACV under and attached to the throttle body is water/coolant , magnetic, electronic (it plugs in), the spindle was seized hard. It took 3 days of soaking with carby cleaner, squirts of wd40 and ,eventually, a firm but gentle twist with pliers to start moving the spindle that appears to be magnetically controlled too, (what a pffft idea). So, the engine would idle fine at start up. Once warn/running temperature, the idle would fluctuate between 900 & 3,300. crazy.
After repairing the IACV, the idle has been good for about 4 weeks. 1.5 l 5sp manual idle @ 750.
well, yesterday the erratic idle restarted. With all the variables of possibilities it could be any of a dozen things.
Think I'll start with cold idle valve adjustment. 2nd will be the IACV again (apparently if replacing, it has to be oem or the computer won't recognise it, what a pita). A new part here is over $900, about $550-$650 US depending on the day. Lots of 2nd hand refurbished? parts, don't trust those.
It comes to a point when the parts to fix these cars are way more expensive than what the car is worth.
It's a shame. When they run well, they are good cars. When they don't, well, bonfire night looks good.
Thanks for the in depth analysis you have provided. Hopefully, at some point, this offset idle can be sorted for a reasonable cost. Mechanics here are way too expensive, as in, they want money even if they can't fix it.
I don't mind paying labor costs, that's business, but, $1,000 or more for a non repair, supposedly diagnosing with no fix, I'll stick to you tube and try and try again until victory
sweet man, thanks for the tip. makes me feel better about what I did in the video.
Excellent video Paul. I like the new editing. Will always be readying your book. What you taught me has already paid off. The
thanks! fixed 95 civic ex,now it runs like it should
Good video, very in depth.
this has helped me a lot I have been trying to figure out this problem for a while now. I have a 95 civic vx 1.5 d15z I have a good cold fast idle but when the car is warmed up it surges and I have already replaced the air idle control valve and still did it so I'm gonna try this one thank you
My 99 crv does the same thing but only on cold days.
Haa, cool. I have an 87 Teg. Ive had for a long time so a hunting idle is nothing new to me. But I did learn something new about the injectors shutting off. It was cool to see someone actually go through a diagnostic procedure with this, and see you learn something new at the same time. Nice job. I always enjoy these vids.
I love your videos.They are very informative!
I’m thinking of just deleting the fast idle valve on my Acura cl. I always warm my engine a bit before I drive it and I feel like it would be better to not have 2k rpm on a cold engine and I just want it to idle low weather it’s hot or cold. Does that sound like a good/bad idea?
Adjusting the TPS until idling smootly solved the same problem. Maybe the surface of the TPS's resistor is worn, and needed to be adjusted slightly. It's running for a few days now like a dream. Hope it helps.
Great fix! Did the original o-rings seal the coolant passages or did you replace them to prevent a leak?
dude i have had this problem happen a 2nd time but forgot what j did to resolve the issue thanks alot
I cleaned the TB unit, still the rpm is at 650 on idle on hyundai i20. Now, I checked for resistances of each 4 ignition HT cables. The 4th wire being the shortest is supposed to have lowest value, however, it reads 8.8 ohm which is very much higher than all the 3 wires..2.4,.2.0, 1.8 respectively. Is the 4th wire leading to drop of rpm to 650??? Awaiting reply. Thanks.
The screw becomes loose inside the valve and needs to be tighten
Love your TS & R VIDEOS
My B20 engine as the same problem, I tried your fix, it seems fine when i put my finger in the hole, but my RPM still wont go pass 3000 RPM, what coulb be my problem ? PLZ help
one thing, if the engine is cold, does the computer still try to correct, when does the surging begin at cold start or at warm up.
My 93 accord is surging and checked vacuum leaks and all valves I cover the top hole on throttle intake and it smooths out so what I need to do please help me
Dan....another great video......About a year or two ago I believe that ERIC THE CAR GUY did a video on this valve,.....might be worth a look....thanks again.....bob
For sure man, and I truly value your input on this. I am still not convinced that this seat didn't work its way loose on this one, but not sure if I will know for sure until I see more of them. And this is a dying system, so I don't expect too many more.
For anyone else reading this, be careful with this "fix" and please understand the variables here.
Hi Paul! Thanks for all the great videos! I was just wondering about one thing when you were talking about injection pulse in the beginning of the video. Is it really the computer trying to lower the idle speed or is the computer thinking that you are under a coast and the computer is shutting the injectors off because of that? I don't know if you have coasting fuel cut off in the US but we have in Europe. If it is a manual gearbox anyway. I'm just think out of the box so tell if it is wrong!
I've had similar issue on my 94 honda b16a engine. The RPM goes about 1500 when engine is cold then it will drop to 1000 when engine is warm but then goes up and down from 900-1400 which same as what I can see from the video. I've tried to clean IACV, adjust the idle screw and adjust TPS but none of them work so at the end I've use my finger to blocked the upper hole which the one opposite from your video and the idle became smooth and health again till my finger released from the upper hole. Can you please advise me what's going wrong with my car? I'm not sure if it means that I have to replace my IACV?
good show thanks my 1995 idle high but smooth takes over 10 minutes to lower to 725 rpm .i live in a cold rainy place 27 days rain in march
thank you my friend!
Hi , I got P1519 and P0505 on 04 Pilot 3.5 ....i bought and instaled new Idle control valve ....and still surges ....any idea ?
Thank you! Ofcourse the main point is the injectors shuting down and I'm sure you are right! Probably the pcm also wants to see a vehicle speed signal for it to go in coasting fuel cut off and I didn't think of that before so my bad on this one! Thanks again for all you effort in making this videos!
Just wonna thank you!
I'm a multiman. know alot of everything.
why because I just love to do things myself.
Why is it so easy. to be very good at stof.
Because of People like YOU.
Thanks
This video is gold
I took IAC sensor from the valve and their was a o-ring that came out that pretty loose in the IAC it pretty big to fit on bottom of valve were it meets sensor , what is it for
okay thanks for the feedback. let me know if there is any that you want to watch again.
I'm not sure if this is what's wrong with mine but I'm having an issue with my Civic 02 where I could drive short distances with no problems but when I drive for more then like 25 minutes the car slows down and even if I accelerate all the way the car only reaches about 10mph. Anyone have any idea what might be the issue?
My daughters 95 accord w/4 cyl v-tech has surging idle. I've flushed coolant and checked for vacuum leaks. the car starts fine but within about 5 minutes the idle goes back and forth from 1,000 to 1,200 rpms. While it's doing it if I disconnect the Absolute Pressure Sensor it misses a little then settles down. Nice quick fix but I DON'T LIKE DISCONNECTING THINGS because I don't know what new problem I may create. I want to clean or possibly replace the IAC but the engine is right up against the firewall and very hard to get at. Is there an indication of what may be wrong by unplugging the MAP sensor?
What does it mean when you plug the top hole and the car dies out, bottom hole made a big difference and reacted with a nice idle afterwards.
Hi Paul question about maf sensor on 02 ford explorer, what is RTN mean?
SIG RTN and MAF RTN .
I've had those valves back out on me quite a few times. Snug em up, and it usually solves the issue.
I have a 99 accord v6 ,after changing the air ideal control valve it's idling high about 2000 rpm cold, 1500 warm , does anyone know if mine has a cold fast idle?