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10-29-2017, 07:42 PM
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#1 | ||||
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Junior Member
 Join Date: Jun 2017
Posts: 12
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2002 SL1 Rough Idle when in Gear and Stopped
I've been experiencing a rough idle, fluctuating between 500-600RPM, when I'm stopped at a traffic light or just stuck in the bank drive thru. When I put the car in park, the engine revs up to a constant 1100 RPM with no roughness at all. I get two codes. P0446-Evaporative Emission Vent System Performance and P0507 - Idle Speed High. The dealer performed a vacuum smoke test and found no leaks. I also replaced the gas cap and IAC valve, and cleaned the throttle body. Any suggestions on what I can try next?
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10-30-2017, 01:05 PM
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#2 | ||||
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Master Member
 
Join Date: Apr 2010
Location: Beautiful Blue Ridge Mountains of Bedford, Virginia. Born once? Die twice. ------ Born twice? Die once.
Posts: 3,152
2001 SL1
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Re: 2002 SL1 Rough Idle when in Gear and Stopped
OK, so when you cleaned the throttle body and replaced the IAC, did you clean/replace the TPS since you had it all opened up, and did you get all gaskets back in correctly at reassembly?
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10-31-2017, 02:14 PM
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#3 | ||||
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Junior Member
Join Date: Jun 2017
Posts: 12
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Re: 2002 SL1 Rough Idle when in Gear and Stopped
I did replace the TPS also. And yes, all the gaskets were properly seated with no folds when I reassembled everything.
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