1z tdi 10mm bosch need help !!!!
Hi all!!!!
I'm new to this forum,I own an 1994 audi 80 b4 1z TDI.
I have been having trouble with the IP. The pump is timed properly
and is within the bounds of the timing graph. The problem is that it has a rough idle, I have adjusted the QA many times into the region where it runs sweet, like a watch!! But when I go to check it by giving it a quick rev the engine stays at whatever rpm I bring it to and does not return to idle. Using Vagcom I have tried to achieve the 3-5mg/stroke but it always reads 0mg/st actual IQ,thats when I have it running sweet and idling perfectly. I have read that that is okay as the pedal has not been touched and isn't requesting a higher quantity. Obviously the car is undriveable at this QA position and have to bring it back to lumpy idle so as to still use the car. I have a hunch the IP has an internal fault, can anyone point me in the right direction as for what to check. I have already had the QA off and gave it a thorough cleaning. What are normal ranges for the fuel temp sensor to read? Any chance it could be a sticking fuel collar? Its a bosch 10mm electric pump just like the one on page one of this thread.
Any help whatsoever will be very appreciated I think it might just drive me insane with the constant lump thump!!