Revving/idleing problem

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May 6, 2012, 12:05 AM

MrJuls

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Revving/idleing problem

Looks like i've sorted out the idleing problem by replacing the idle air control valve.But now the revs still sometimes stay sky high when i engage the clutch.Also when changing gear the revs don't come down like it's supposed to.Has anyone ever experienced this before?

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May 21, 2012, 11:50 PM

Blitz_b9

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my idle drops down to 200-300 & car tries to stop. Will i be able to fix this by cleaning the Idle control valve???

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May 23, 2012, 01:39 AM

Honni414

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i got the same problem, im trying to figure it out

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May 23, 2012, 02:37 AM

MrJuls

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I've finally found the problem,after replacing the iacv.The screws that hold the butterfly were a little loose,so the butterfly couldn't be centered.Just tightened them and it's sharp.

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May 23, 2012, 07:31 PM

Blitz_b9

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seems like lot of evos have this issue..

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May 23, 2012, 11:10 PM

MrJuls

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Yes definitely.The guy at the parts desk told me that even the Triton bakkies(pick up) have the same problem.

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Jul 24, 2012, 11:48 PM

Honni414

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Quote:

Originally Posted by MrJuls

I've finally found the problem,after replacing the iacv.The screws that hold the butterfly were a little loose,so the butterfly couldn't be centered.Just tightened them and it's sharp.

what does any of that mean? and im still trying to figure out how to fix this

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Jul 24, 2012, 11:58 PM

RoMeIX

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Mine does this too, I think that this actually if pretty common.

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Jul 25, 2012, 03:35 AM

MrJuls

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Quote:

Originally Posted by Honni414

what does any of that mean? and im still trying to figure out how to fix this

Do you still need help with this?

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Jul 25, 2012, 10:50 PM

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Honni414

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unfortunately, yes. What is this "butterfly" you speak of on the IAC valve? do you have pics? or a how to?

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Jul 26, 2012, 06:17 AM

#11

Locdizzel

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I just had the same problem and got a used iac put in then idle stopped jumping around but was a little high, so my tech adjusted the tps while checking evoscan down to 12% and biss screw and its perfect now