Me too. I thought the pump didn't run except for priming. The VW SSP for the fuel system says:I'm still of a mind this is a fuel supply issue, and the injector deviation is caused by air in the fuel.
I've also read this SSP305, and I find the wording very ambiguous! Pre-supply could mean in a fuel flow order (ie the tank pump is pre-supply, the tandem pump is intermediate-supply, and the injectors are final-supply) or it could mean the timed sequence of events. I personally read the former into that wording, but I may be wrong!Me too. I thought the pump didn't run except for priming. The VW SSP for the fuel system says:
'The tank serves as a pre-supply pump, and pumps fuel to the fuel filter.' It doesn't mention it carrying on running. According to that SSP there already is a non-return valve which looks to be inside the tandem pump but that won't help if there is a leak further back. You really could do with pressure testing all the pipework (and checking the fuel filter inlet connection).
I think it should be found on the 2.5 (that actually have a DPF!) Ch 068 field 2. I only know this from it coming up about 10 years ago on Brickyard. How clogged is your DPF ?Anyway, back to what I was doing......
Am I being a complete numpty, or does the ash load measuring block not exist for the BNZ BPC? I've looked numerous times, and can only find the soot load, which today was 75. There are 2 other measuring blocks, load coefficient, and else something similar, but these are always at zero, even after a 10 mile drive. As the ash load should be checked at the 120,000 mile service, surely there must be a number somewhere?
My Audi A6 3.0TDI has the ash load in the measuring blocks plain as daylight.
Well, it would appear there is a problem with the label file, ie possible translation errors.
I've found with VCDS output tests, they won't re-run unless you close the controller down in VCDS, then re-open it and start the output tests again. Turning off the ignition freezes VCDS for a while as it doesn't know what's going on, but will reset the output tests when VCDS starts communicating again. What I'm saying, is it's quicker to close and open the controller, than turn off the ignition, and freeze VCDS for a minute or so.That's to stop it overheating. You can repeat it (since your pump is knackered anyway) but you might have to switch the ignition off and on and start again.
Good tip. If just closing the controller works then great. But if not, a switch ign off/on may be needed.I've found with VCDS output tests, they won't re-run unless you close the controller down in VCDS, then re-open it and start the output tests again.
It is quite unusual to lose communication with a controller in the middle of a session. Have a look at the LED's (if your cable has them) on top of the cable where it plugs into the van. It should go to solid green when you first plug it in (with ign on) and flicker when data transmission is occurring. If it goes back to amber when you move the cable slightly, the connection may be poor.The VCDS is coming up with this message whilst running.
Is this just a software fault or is it something else?