JB4tech.com - International Turbo Tuning Discussion
135idriver 135idriver is offline
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Join Date: Jun 2021
Car: 135i 6mt
Default Rough idle, misfire, valve cover gasket leak - 06-03-2021, 07:10 AM


So my 135i, n54 is at around 99,000 miles and when I start it it idles fairly rough, and thereís white smoke coming from the exhausts at idle when itís cold. Itíll sound fairly lumpy and fluctuate from 800-1100 rpm.

I noticed my valve cover gasket is leaking some, could this be the issue?
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