All Things Mk5 > Mk5 General Area
Shakey Cold Start
OllieVRS:
Started the car this morning to have the engine running but shaking the whole car with the regs steady at 1000. Turn the car off and on again and it was still shakey, but disappeared after 10 seconds and back to normal, nice and smooth.
I parked with the car facing downhill and with a full tank, could this have been the cause?
I also occasionally get the fault code on VCDS for P0441 (charcoal can/N80, I know) but not frequent enough to throw a CEL.
Or is it the valves reminding me they'll need to be carbon cleaned eventually?
Engine on 132k miles, fuel filter changed.
Cheers
Octoparrot:
For the first time ever mine ran a bit rough on first start up on Tuesday, definitely not firing right on 1 cylinder, cleared up after about 10 secs or so and has been fine since then. I just put it down to the cold damp weather.
pudding:
--- Quote from: OllieVRS on November 17, 2023, 10:41:16 am ---Or is it the valves reminding me they'll need to be carbon cleaned eventually?
--- End quote ---
That is certainly a possibility. Cold starts/warm up is the only time the fuel injection strategy actually runs in 'Stratified' mode (the S in TFSI), so bunged up valves can interrupt the airflow enough to cause misfires in extreme cases.
Non functioning or sticking swirl flaps is another cause. Those, the valves and the fuel supply all need to be tip top to get a dead smooth cold idle/warm up.
OllieVRS:
Just completed a lovely trip to the Cliffs of Moher and back to Dublin without any issues bar one tiny situation.
Was doing a bit of a cheeky overtake on the motorway on the way back, flooring it (in 5th I think?) and I got this this sort of judder/stutter. At the time I thought it was wheelspin as it was raining. But now I've checked VCDS and it seems at that very moment I got a low fuel pressure fault code :scared:
What could it be?
EDIT:
Not sure if relevant or not, but had this code come up while on the dyno getting mapped a couple days prior:
mjmallia:
Checked your HPFP cam follower and cam recently?
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