1994 Honda Accord Car Idle Engine Keep On Getting Loud Normal Driving Fine

1994 HONDA ACCORD
147,000 MILES
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when the car is idle, the engine keep on getting loud and then normal but when driving is fine, what can the problem be?
Nov 28, 2012 at 2:23 AM
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KHLOW2008
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Sypmtom is known as surging and this is due to excessive high idle.
Possible causes are:
Vacum leakages,.
Lack of coolant.
Idling speed adjusted to high.
Faulty Idle Air Control (IAC) valve.
Cold start valve(fast idle thermo valve(FITV)).
Clogged coolant hoses to FITV and IAC.
Nov 28, 2012 at 4:55 PM
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