Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

idel question

Old 21-Nov-2005, 02:46 PM
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idel question

hi i got a 90 integra with a b16 swap in it. And yesterday my car started to idle all funny, it would idle up and down but only when the car is nice and worm. So i went and look under the hood and check my vacume hoses they all seem fine, then i check the vacume map sensor its mounted on the fire wall and shook that up a bit and it ideled fine for a bit. So i replaced that cuz i have another integra it seemed fine untill the car wormed up then it started again.

I had this same problem with my civic but the head gasket was blown on the civic, and i know a couple other cars that had the same problem as well with no blown head gasket, it turns out to be the termostat.

In my integra i replaced the thermostat so i dont think its that, unless the thermostat is junk (defective). If anyone knows what could be wrong let me know tnx.

p.s. my temprature is fine the car doesnt over heat or anything..
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Old 21-Nov-2005, 03:50 PM
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IACV
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Old 21-Nov-2005, 03:51 PM
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^^^^^^^^^^^^yup
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Old 21-Nov-2005, 05:59 PM
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try unplugging the IACV (idle air control valve) the idle should drop to around 500-600rpms and smooth out. If it does then i would suspect the IACV to be faulty.
This is a very common problems with b16's, just to let you know a IACV from honda is like $350, and that was the only place i could source one new, short of ordering it online. So just grab a used one.
You could try taking the IACV off and cleaning it, but that has never worked for me.
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Old 21-Nov-2005, 07:19 PM
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ahh thanks to everyone for your help..

Originally posted by zeeman
try unplugging the IACV (idle air control valve) the idle should drop to around 500-600rpms and smooth out. If it does then i would suspect the IACV to be faulty.
This is a very common problems with b16's, just to let you know a IACV from honda is like $350, and that was the only place i could source one new, short of ordering it online. So just grab a used one.
You could try taking the IACV off and cleaning it, but that has never worked for me.
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