06/14/2026
Where did the spark plug go?! 2016 Passat 1.8t
I recently got an APR stage 1 tune, flashed at home. Took the car for a drive and gave it a little peddle (a lot of peddle). Car turns on epc light and starts shuddering like crazy, I get it home and hookup VCDS, misfires racking up on cylinder 4 so it had also shut down cylinders for safety.
Reset codes and turn it on adv. measurements and Take it for a drive again. Cars driving great for a minute, live misfires upto 25 after 2 minutes driving. Ok so problem with cylinder 4, other cylinders seem fine. I presume older coil has s**t itself being from 2019, and had a misfire here or there the last few months before the tune on cylinder 4.
Out of curiosity I decide to take out spark plug on 4 and check it out… bottom strap is gone. Like completely gone. At this point I’m s**tting like is my cylinder gone? At this point I replaced all plugs, start it up and hear a metallic ping coming from cylinder 4. (Live misfires at 10 after 10-20 seconds)
30 seconds later after I’m trying to figure out exactly where the pinging come from, noise stops and misfires go away. Car starts to run perfectly. 0 misfires, all other live measurements, fuel, boost, requested and actual values all perfect. Has run like new the last few days.
My question is, Where tf did the strap go, out the exhaust?