Subject	Miss on #1 when cold, disappears on warm up
Posted by	vorpalZ on July 11, 2016 at 12:38 PM
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Message	Hey all, Was just going through my tt 'vert and I noticed it's definitely missing on startup and when cold idling. Did a power balance test with Datascan and pulled coil pack connectors and determined that #1 is missing. - Swapped coil pack over from #2, still missing on #1. - Installed new iridium plug, old one looked fine, still missing. - checked PTU connections, all good, new harness from the tt swap in 2013. -checked injector connector and injector, new 740 from 2013, all good there. Now the weird part... as the car warms up, the miss disappears and everything runs fine. Power balance test makes every cylinder lug as it should including #1. Haven't tried a different PTU yet, I can swap one over from one of my other Zeds. Also, haven't checked fuel pressure, need to get a gauge. Any other ideas? Thanks,
Follow Ups	Miss on #1 when cold, disappears on warm up - vorpalZ 12:38:53 07/11/16 CAS connection? I just went through it myself,it was really - YlwPrlZTT 12:43:10 07/11/16 A starting to fail PTU could be the issue? As engine warms - jzack 17:41:19 07/11/16 BTW- you could test this idea by starting the car and then - jzack 21:06:56 07/11/16 Agree with zjack. Please follow-up with a post when fixed. (n/m) - OverZealous (CT) 12:17:01 07/14/16
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