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Sudden high idle at stoplights when engine warm
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Old 23 May 2014, 01:49 AM   #1 (permalink)
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Sudden high idle at stoplights when engine warm

Hello everyone,

I have a 2003 Impreza with 108K on it. Over the past few days, it's been doing something weird. When I'm idling in traffic (clutch in, brake pedal depressed) the revs sometimes jump up to around 300, rather than settling down to 750 as they should. This is accompanied by an audible growling sounds from the engine. It's intermittent - doesn't happen when the engine is cold. If I turn the engine off and turn it on again, the problem goes away temporarily.

Any suggestions as to what is going on here? It might also be relevant that this has been happening over the last few days when the weather has finally gotten warm (I live in northern Canada). Engine temp gauge is normal, oil was changed 300KM ago. It handles fine, no misfires or stalls.

Thanks in advance!
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Old 23 May 2014, 09:10 AM   #2 (permalink)
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Re: Sudden high idle at stoplights when engine warm

just clean the idle air control valve
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Last edited by 2002pete; 27 May 2014 at 02:12 PM.
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