Coil packs starting to fail? TFSi.

[randomeddy]

Our car has the TFSi engine, it has not missed a beat in over four years but twice in a week it played up a bit.

One time it would not fire, turning over fine but would not start, next try it was fine.

Next day it started fine but was running rough, it cleared after about fifteen seconds and has been fine since (a week).


I scanned it but it showed nothing. Do the coil packs fail gradually or just fail and that's that. Any opinions/ideas.

[E-bmw]

Just to rule it out next time leave the car door open & see if you can hear your fuel pump prime the fuel lines for a few seconds & then turn off before turning to start the engine.

Could be that the fuel is leaking back to the tank & needing a bit time to prime first.

[Novexx]

Had a TFSI which had a couple of misses on a motorway trip with a couple of flashes of the engine warning light, the faults must have cleared by the time it was taken to the garage, no codes & no problem apparent.

About a month later coil pack went bang, car a non runer. Coil pack replaced for medium outlay & about a week later a constantly illuminated engine warning light appeared, dodgy coil pack had screwed the cat - not so medium outlay.......

Oddly enough the car was just coming up to the 4 year mark.