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Discussion Starter · #1 ·
Hello all, well not sure on this one but it's a head scratcher. Maybe some of you have seen this but i have not. 2009 s8 T6 3.0, melted ignition coil, no warning what so ever. Now car won't start and it sounds like no compression in the engine? It is my daughters car, and its at the shop but I worried of the outcome at this point. Only 126K miles...any thoughts? Changed battery on a Thursday, no issues, then Saturday daughter says car was acting weird, ck engine light, shaking, and she pulled over. I got to her 5 minutes later and you could smell the electrical burning smell. I literally watched the ignition coil burn up. Thanks ahead of time...
 

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Discussion Starter · #2 ·
We found out there are two things, one is the thermostat possibly causing the overheat and melt of the coil and the other is each time it happened, you need to replace the engine fuse. It’s a 20a small fuse in the fuse panel in the engine comp. the no compression symptom is because of the engine fuse and it’s not turning over. Replace the fuse and all coils, did the thermostat too and have had no problems since. There is some discussion on here about ghost feeds from the alternator that could also cause it but not sure on that. Good luck
 
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