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Old 10-03-2017, 10:55 PM   #1
jrm_gti
Newbie
 
Drives: 2009 GTI
Join Date: Aug 2017
Location: San Antonio TX
Posts: 2
Misfiring Only When Hot & at Idle

09 Tsi Gti, 118k. Car starts up and runs fine for a while, but like clockwork when nearing 40 minutes of driving and coming to a stop or fully stopped, I get a flashing CEL. RPMs drop a bit then go back up as well, Obdeleven shows misfire all cylinders and always misfire on cylinder 1&4.

Its weird, as long as my commute is under 40 minutes, I get no misfiring at all. Car runs great under any kind of throttle. Replaced spark plugs and pcv. I do plan on replacing coils and have a valve cleaning done.

Any help, or insight is appreciated.

Last edited by jrm_gti; 10-04-2017 at 12:49 AM.
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