idle at start up
06-23-2003, 05:11 PM
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idle at start up
I am posting this for a friend. He has a 94 Civic Ex. The problem is that everytime he starts up his car when it is cold, the rpms will jump up and down from about 1k to 3k for a minute or two. I cannot figure out what the problem would be? Anyone know what the problem might be?
06-23-2003, 05:23 PM
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does it surege or does it just say at 3000 for a little while or does it go 1000-3000-1000-3000....etc.?
if it just stays up then its normal its just trying to bring the engine up to normal operating temp.
if it surges then it may be his coolant temp sensor or it might be his IAC.
if it just stays up then its normal its just trying to bring the engine up to normal operating temp.
if it surges then it may be his coolant temp sensor or it might be his IAC.
06-26-2003, 01:33 PM
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Originally posted by Bakeoff
I had the same problem with a bad throttle body gasket. All it is, is a leak somewhere on the intake end of things.
I had the same problem with a bad throttle body gasket. All it is, is a leak somewhere on the intake end of things.
06-26-2003, 03:22 PM
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Originally posted by Chrgsr96
With this problem would it only surge up and down at start up?
With this problem would it only surge up and down at start up?
06-26-2003, 05:31 PM
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if its a leak it wont surge it will just rise really high. its your Idle Air Control Valve. wheres his idle when its in drive? if its high then it may be a leak but if its normal its most likely his IAC valve.
06-27-2003, 07:56 PM
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Yea his idle is normal after it does the weird idle for a minute. So I'll have to tell him to check into that IAC Control Valve. How much do those cost for a new one? Or whatever would need replaced?
