PlasticMac
Admin Team
A compression test would give you a clue as to the health of the mechanicals.
Mac.
Mac.
Is that the electric pump?Did a compression test a few months back, looked normal on 3 of 4 cylinders with one being a little lower but within limits.
Just finished replacing my rear brake calipers after poor handbrake performance and grinding brakes that didn't release fully. Night and day now, and a nice tight and strong handbrake.
The good news is on top of this. I managed to resolve the bogging down engine on restarts when hot and I also completely removed the sputtering and misfiring sounds when I idled the engine hot!
I did two things but I can only guess one of them fixed it.
Replaced the fuel pump and replace the lambda sensor. The fuel pump was replaced with a different second-hand one last year but I decided to do it again.
I really couldn't guess which did the fix for sure, but the way the engine behaved was as if the ECU was compensating for something, and perhaps it's more likely it was the Lambda sensor?
Next up, a new stainless steel exhaust for that car which is booked in already
Happy days.
Note: for anyone just reading this part I had no engine faults showing up on VCDS before or after the works.
Yeah the one under the seatsIs that the electric pump?
Mac.
The high pressure pump is engine driven, so until the engine turns over, it does nothing. The electric pump primes it, so it's ready. We need to be carefull, before blaming the high pressure pump, that the electric one is operating at full pressure. If the pressure from the electric pump is low, so will the output of the high pressure pump.8Z0919051C - £37.50 from ebay. If that's what you are asking?
Yeah, I have heard you mention this vaporising that needs overcome when the fuel is heated by a hot engine.
I assumed fuel pumps were far more reliable for this to actually be the issue.
Interesting you have seen this being a problem repeated in the FSI.
@VVVVVV just supplied part number for lift pump, available on Amazon, and other online markets.So my car was great for about three days and now I am back to where I started.
The second hand pump I got perhaps failed it would seem that way but this is already my third fuel pump in this car now.
Car bogs down when hot, low torque at high speeds.
I thought I had sourced a new fuel pump but after a call today from deutscheparts there was a mixup in the part numbers. Audi Tradition also don't have any as do Audi themselves.
I will run some more tests on VCDS lite and report back here soon.
Elring Parts confirm the correct pump for the BAD Engine is Pierburg 7.02550.61.0I've emailed the Pierburg distributor in UK, and asked what the difference between the PIERBURG 702550540 and the PIERBURG 702550610.
He's just asked for a VIN, so I've sent him mine. I'll post up when I get his reply.
We'll get there ... (not sure where though).
Mac
As far as I understood both pumps are the same. Just ..540 pump code is different as it sold together with white tank.@VVVVVV just supplied part number for lift pump, available on Amazon, and other online markets.
PIERBURG 702550540 or
PIERBURG 702550610
No idea what the difference between the two is though.
Mac
The tank thing is the "swill pot"As far as I understood both pumps are the same. Just ..540 pump code is different as it sold together with white tank.