really bad idle problem help. Finally sorted


jp_ek4ferio

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Jun 11, 2013
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well lads having a bit of an issue with my idle, basically its fine when its cold until it gets warm then it will start fluctuating quiet a bit sometimes it will cut out. but if i start it again it might idle perfect and other times it might only be a little lumpy 150 RPM or so. i have cleaned the iacv and checked tps and also took apart and cleaned the fast idle valve, iv checked for vacuum leaks. im all out of ideas on what to check anyone any idea ?
 
Thanks it's probably well due one because it's very hard to get one for a da integra
 
Yea I have tried that but when I let it get up to temp and unplug the iacv the engine will just cut out so I can't reset the idle. I read somewhere if I let it do 5 cold to warm starts it will relearn it itself ?
 
You dont unplug the iacv when doing reset.

Clean out iacv or get a replacement.
Fit iacv
start engine from cold and let it get up to temp without touching any controls.
once the idle has lowered to normal setting (just below 1k) turn off engine then restart again.

Thats way i always done it after cleaning out iacv, maybe your valve is just past it.
 
So I replaced the fuel filter and reset the ecu. I let it warm up again today and it seems like the idle is really lumpy while it's warm (not quiet operating temperature) then when it's at operating temperature it is fine until I give it a Rev then it will cause it too be lumpy for a few seconds ??
 
Iv decided to look at ignition and fuel pressure. Going to test fuel pressure anyone any ideas on what else might cause it it's a real pain
 
This Is What To Do ! And What Iv Always Done To Relearn Idle,
First make sure idil screw is backed out 3/4 from lock,
You may need to reset your idle. Try the following:
1. let car warm up until radiator turns on
2. disconnect iacv sensor
3. , adjust idle screw to 600rpm
4. turn off engine, reconnect iacv sensor connector
5. , reset ecu
5.1.let car cool down have cup tea whatever,
6. turn on engine and let ecu calibrate (give it 7 min) , DO NOT STEP ON THE GAS
7. turn off engine
8. turn on engine, test drive.
Hope This Helps
Pasted from another site
 
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I'm planning on doing this just need to get the pressure tester tool to get s reading unless there's another way of doing it ?
 
Such a small little piece can cause all kinds of headaches
Good that you found it and also reported back,
Hate when people ask for help and then never report back what the problem was ,
 
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