Hi,
I tested vacuum again today with the new gauge I put together. It now measures -20HgIn which is a bit more acceptable.
Quote:
Originally Posted by aTOMic
Mechanico Lee, you are a saint for your thorough, scientific method of tackling this problem (should say these problems). Is there an auxiliary vacuum pump on the petrol engines? Should I disconnect it while checking manifold vacuum?
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There is no auxillary vacuum pump on these engines that I'm aware of. Just the "suction jet pump" that most VWs seem to have. This uses the "venturi effect" to increase brake booster pressure I believe.
Quote:
Originally Posted by aTOMic
Seems Lee is a better "specialist" than you'll find locally.  |
Luckily I'm only a 30 minute drive from Lee if my new fuel pump doesn't help things!
I will update this thread once the pump arrives. Turns out I also need a specialist tool to remove the old pump and a new gasket which come seperately.
Quote:
Originally Posted by aTOMic
Can you see function of fuel pumps 1 & 2 on VCDS? I cannot believe considering the thousands of sensors Audi uses on this engine that there's not a fuel pressure sensor or two on this "BFM"!
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If I remember correctly you can see the status of both fuel pumps from VCDS (on/off). As you mentioned there is no fuel pressure sensor for some reason!
Quote:
Originally Posted by aTOMic
When I did the leak test with propane, I could pull a vacuum line and hook the propane hose fully into the opening and the car wouldn't even shudder. Is this a symptom of something?
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The propane test didn't initially work for me as you mentioned - blowing propane into a small vacuum line did nothing. However, if I blow it directly into the throttle body or a large vacuum hose (PCV valve) for a few seconds it does give a slight reaction.