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r/tdi • … • u/golfzerodelta

Mk6 Sportwagen - Flashing glow plug, possible misfire and died at a signal light

Fun scenario, unfortunately don’t have my code scanner and couldn’t make it home to hook up VCDS but wondering if anyone knows from the symptoms what to expect in terms of repairs.

2013 Jetta Sportwagen DSG w/166k on the clock. Forgot to add deleted with the Tunezilla Stage 2 tune for 30k miles at this point. Been hearing slightly more of a rattle lately (last week or so) when driving but could never pin point it and no codes/lights.

Was driving home and about 1.5 hrs in I got a flashing coil light and started to hear a more pronounced rattle from the engine, clearly one of the cylinders and I’m guessing what is a probable misfire. Definitely in limp mode and the check engine light came on.

I was relatively close to home and got off the highway, and when I got up to a red light and stopped the car died. I attempted to restart, the car cranked for longer than normal (3-5 seconds?), started and then died a few seconds later later. A lot of white smoke from the tailpipe attempting to start.

Curious if folks have seen anything similar and what the typical repairs look like. I know it’s hard without codes but don’t have my laptop to scan with. Normally do maintenance myself when possible but have to get it going tomorrow for work so will be towing it to a shop tonight. Cheers!

ETA: Shop called with an initial diagnosis - main faults are related to fuel pressure; pressure sensor low and a fuel rail pressure low fault. Last fuel filter change I did was 160k and it was clean then. They also said I was about 2.5 qts low on oil which is unusual; I did the oil change at 160k using an extractor and always top that off, but don't know if it's related or simply a TDI burning oil.

ETA2: final diagnosis was the CP4 failed and couldn’t maintain pressure. Makes sense now what the rattle was. Apparently they haven’t found any metal flakes or shavings but will know more when they dig in to replace the pump. Need to go buy my lottery tickets now because idk how the hell it failed without exploding. Do your fuel filter changes and prime the pump kids!

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