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Old 01-18-2018, 11:50 AM   #552
LarryRS
Scooby Newbie
 
Member#: 219682
Join Date: Aug 2009
Location: Sacramento, CA
Vehicle:
2005 9-2X

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This fixed my issue. I got a CEL for P0507 and P0519. My symptoms were not apparent at first but became an engine idle starting around 1500rpms and often opening up to 2000 rpms in park in 50-60degreeF temps. While driving with the issue existing for a day, I noticed a shudder in the <2500 rpm range while accelerating and some slight rpm shudders on decel between gears.

I got the replacement gasket and did the IACV cleaning. Only I pulled off the IACV a second time when I realized I didn't actuate the valve and verify it was opening without resistance. IACV had plenty of black dirt but no solids to speak of. Got it real clean.
Testing afterwards, the idle seemed to still be high, but after a test drive the high idle and shudder during accel went away.

Thanks OP!
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