crazydriver81
04-07-2013, 10:31 PM
My car developed a problem which seems to be related to an overfuelling issue. Now I need some guide, where to look at for the cause(s).
The problem:
If engine is warm and you rev it, then go off pedal (without BOV opening-at least I cannot hear) it is huntig for idle RPMs and then stalls. If engine is restarted, you can recognize a bit of black smoke from the exhaust and it smells like unburnt fuel.
Additionally, when accelerating and going off the pedal and on the brake pedal, car stalls. Again it smells "fuelly",
Further, if accelerating a bit harder (not WOT) you can see black smoke behind the car.
Fuel consumtion is really bad and I constantly get black shades around the exhaust on rear bumper. The whole problem occured, when I restarted the car in spring this year. Not had the problem last year. Modifications = None which were not present alreay last year (255lph fuel pump on stock FPR, VTA BOV from Amber Performance).
Other than that, the car is running fine. Idle is stable and on cruising no problems. TPS settings are fine. No CEL flashng/lighting up. I changed the MAF sensor already and made a full ECU reset. It got a bit improved, which means the car stalls less often.
Checked boost pipework and found nothing irregular. Checked for hissy noise - nothing either. Boost buildup is fine at around 0.7 bar max.
Where to look at else?
The problem:
If engine is warm and you rev it, then go off pedal (without BOV opening-at least I cannot hear) it is huntig for idle RPMs and then stalls. If engine is restarted, you can recognize a bit of black smoke from the exhaust and it smells like unburnt fuel.
Additionally, when accelerating and going off the pedal and on the brake pedal, car stalls. Again it smells "fuelly",
Further, if accelerating a bit harder (not WOT) you can see black smoke behind the car.
Fuel consumtion is really bad and I constantly get black shades around the exhaust on rear bumper. The whole problem occured, when I restarted the car in spring this year. Not had the problem last year. Modifications = None which were not present alreay last year (255lph fuel pump on stock FPR, VTA BOV from Amber Performance).
Other than that, the car is running fine. Idle is stable and on cruising no problems. TPS settings are fine. No CEL flashng/lighting up. I changed the MAF sensor already and made a full ECU reset. It got a bit improved, which means the car stalls less often.
Checked boost pipework and found nothing irregular. Checked for hissy noise - nothing either. Boost buildup is fine at around 0.7 bar max.
Where to look at else?