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rough idle - Impreza 2007
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Old 23 Nov 2012, 09:22 AM   #1 (permalink)
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rough idle - Impreza 2007

Subaru Impreza 2007 Auto, been having problems the last few weeks with an extremely rough idle at varying times, which fixes itself after 10 seconds. Also seems to lose power when running every now and again - which again fixes itself quickly.

Spark Plugs have just been replaced, fuel filter only done 2 services ago, and don't need to be done for another 2 services.
The dealer wants to try a few things including O2 Sensor replacement (but replacement, not testing..), Injector Flush etc.
Is there anything anyone knows that could be causing this, as I said only intermittent. The Upper Engine Clean was performed at last service (3,000km ago).
I have been told the O2 sensors replacement is about $500, so I don't want to do that right now.
The only other issue I have with the car is a power steering pump whine which happened after last timing belt replacement. Someone told me that vacuum pipe cracks can cause my problems, but does the power steering pump contain any of these pipes? Sorry to sound ignorant and stupid, but I don't know much about cars and can't afford full dealer repairs like the O2 Sensor.

Last edited by mark81; 23 Nov 2012 at 09:24 AM.
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