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Solving Automotive Idle Problems
Solving Idle Problems
I might get more requests about idle issues than any other topic. I think part of the reason is that there are so many possible causes of an idle problem, so it ends up being a common issue. The causes might vary, but most idle problems are caused by a mixture issue. It’s up to you to find the cause of the mixture issue. Once you do, I’m sure you’ll be able to get rid of that idle problem.
19 thoughts on “Solving Automotive Idle Problems”
RJ
February 13, 2024 at 6:18 am
Hello Mr car guy i have a 92 honda civic that when it warms up it will idle like its about to die ive replaced the fuel filter the fuel pump i checked the iacv i replaced the spark plug wires about 2 years ago along with the spark plugs and it just recently started acting up where should i check next??? Please i would really appreciate your help
Wes Crews
October 27, 2023 at 11:34 pm
Hello,
Vehicle in question: 2002 Honda Odyssey. Problem: originally no start condition.
Remedy as per your video – repaired solder joint in main relay .Vehicle now runs but has a bouncing idle.
Checkers power steering pressure switch wiring.. all ok.
Would a defective IAC valve cause this issue ? If not ? What else?
I’m stone walled. BTW… no DTC codes present.
Would sincerely appreciate any advice or pointers.
Absolutely love the videos.. they have been a tremendous help.
Hope to hear back.
Wes in MS
Ron Kanna
May 22, 2023 at 3:14 pm
1995 Accord 2.2l VTEC
My idle surges from 1000 to 2500 constantly until I unplug my IAC valve. I have cleaned my egr ports and tried a new IAC valve but I still have the same problem? Something is telling the valve to stay wide open when it is plugged in??? Could a temperature sensor be causing it?
The only thing I can think is that I put a new aftermarket IACV on and it is also faulty?? I find it hard to buy a $300 part when that might not be the problem??!! I also replaced the IAT sensor, the temperature sensor and put a different throttle body on, I have bled the cooling system several times and it STILL SURGES!! Sometimes I can hold the rpm’s at about 4000 for several seconds and then it will idle down but only until I give it more throttle then it starts surging again???
James
March 25, 2022 at 3:36 pm
2002 accord V6 j-series sat for a year. New alternator, battery, fuel, pump, spark plugs, etc. idle surge issue and when it happens the TCS light comes on as well.. any ideas? IACV probably
John
January 26, 2022 at 11:56 pm
I’m having a problem with a 2002 Acura TL type-S. I have codes P0505 and P1519, saying there’s a problem with the IACV. The car is surging at idle, from 1k to 2k RPM. I cleaned the throttle body and the IACV valve and did not help. Replaced the IACV and did the idle relearn procedure and still doing the same. Replace the FICV that right below the IAC and improved a little. It now starts at high RPMS, then starts to surge for s few minutes, then stays between 1450-1550 RPMS. Only does it in Park and Neutral. I’ve checked electrical connections and everything seems fine. Have checked for vacuum leaks or EGR problems and didn’t find anything out of the ordinary. Have replaced and bled the cooling system in the process also. Any suggestions on what to check?
Gage
March 26, 2023 at 1:25 pm
I had have the same problem which left me very clueless on what to do after changing my MAP Sensor along with IAC Valve I proceeded the idle relearn procedure and still nothing untill when I just started to hit my throttle body and the idle have just went back down to regular idle which was at 845 for mines. That’s when I’ve notice my throttle body is going bad. I had changed my throttle body, done the relearn procedure drove for 10 miles and bam it was fixed. Before It would just throw P0505 code. Hope this helps
Kenneth DeLome
October 4, 2021 at 11:30 pm
ok so my daughter has a 06 scion s/a it has been running as it should and now she is having a issue under a load and at a momentary idle im somewhat savy with motors but mostly chevys with that said i go with my gut and want to start at the tank…. thoughts …. this problem just started about 2-3 days back when she was running late to work and ran low on fuel on her way after work.
Oscar Talamayan
September 10, 2021 at 5:13 pm
Own a 2010 Camry LE 2.5L 4cy. Issues are :
Car ENGINE TURNS OFF
1. while making sharp nor slight tuns
2. Engine turns off suddenly for a block straight driving.
3. When car Stalls it can turn engine on again.
4. Car Stalls only when driving
5. When parked, No lights in dashboard. Normal idling. Don’t Stalls and rpm at steady 6,000
Please Help
Zack lowe
July 20, 2021 at 7:31 pm
Having a problem with my 2000 Honda Civic ex when it’s in park and ac is on the car sounds like it wants to stall out and the idel tends to jump. when the ac is off the idle is fine it idles at 500-1000 rpm could it be my (IAC) ?
ron
February 12, 2021 at 3:22 pm
i am currently having this issue. 2003 honda crv 2.4 UK manufactory model. things ive tried, 1)purchased the $300 oem iac , 2) iac relearn procedure 2sec on then 3k rev for 10 without any load, 3) removed the ecu/pcm fuse for 5 min then replace and tried the relearn again, 4) check for vacuum leaks, 5)replaced the pcv incase this was the issue. i initially removed the old iac cleaned it and installed with no luck, this is why i bought a oem replacement. One thing i’ve noticed, when i erase the p0505 code with obd scanner, the crv idles perfect until driven and the check engine light comes back on. hopefully you may have some insight. thank you in advanced
Paul Petty
December 22, 2020 at 12:21 pm
I have a Nissan Altima that won’t will crank but won’t stay running,if I hold the throttle down it will run but I’d I release the throttle it dies…please helpppp
Leon Witherspoon
September 4, 2020 at 8:41 am
Hey hi everyone, I owned an 95 Honda Civic EJ1 D16y8 block with Z6 head. My problem is that when I started the car it idles fine but once at operating temperature it idles down and shut off. Any help would be appreciated.
Shaquille Smith
August 29, 2020 at 4:03 pm
My 2000 honda accord is just surging i change the water pump now i put everything back together start one crank but the idle just keep reviving ive clean the idle control valve an intake an throttle body with carb cleaner but it still surge up an down from 1500 to 2000 rpm can u help
Uzi
July 30, 2020 at 3:48 am
Hi ERIC hope you will be doing fine…. i am having a issue with my idle with AC on it drops badly while AC and stays low idle with AC on can you plz help me out…. plz plz plz
Donald
July 24, 2020 at 7:45 am
Hello! I have a 1993 Honda Civic EG6. I have an idle problem on it. the engine is sucking. Anyone have this experience and how to solve it.
Juneju gacutan
July 13, 2020 at 2:34 pm
Hi! I have a honda civic lxi 1998 model automatic. My oroblem is that when i turn-on the AC, it will shut down. Kindly advise. Thanks in advance
Sam
June 25, 2020 at 9:47 pm
Short and sweet 1993 Honda Accord CB seven. No modifications EX model. I am having the idle issue that is all so common where it fluctuates after it warms up a bit. I have a replaced the idler units in the front of the intake manifold and cleaned throttle body. check for water leaks and air leaks.With no avail. I have purged my water system. I have a video of me running the car and then putting my finger over the top hole in the throttlebody on the side closest to the firewall and idle drops and stays perfect. Does this mean I need to replace the throttle idle sensor?
Billy
June 7, 2020 at 3:48 pm
I have a 2005 Silverado 1500 5.3l V8, recently when I am driving and I come to a stop light and im just sitting there in Drive, my battery gauge will move back and fourth and will have a slight rough idle to it when only the gauge is moving, the battery is brand new, what could it be? I know I have stuff plugged in to my 12v ports that I use, the battery gauge doesn’t drop below 14
Dylan
March 13, 2020 at 4:47 am
Hi, I was changed my mini cooper s r56 oil filter housing gasket and oil feed line and return line. But I foud the turbo is not like before have power, especial I cannot hear the dump valve sound and wastegate looklike not working. the code is P112B, p0340 and p2188. when I was changed before only have p2188.