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cold start problem
In message <19971110174552.AAA22104@LOCALNAME> Vincent Mak writes:
> My 87 5000CST developed a cold start problem recently. The car would start
> up fine if the outdoor temperature is approx. above 60F. but won't start if
> it is chilly outside.
Just debugged one of these on Roger Galvin's Coupe quattro.
Dead warm-up regulator (a.k.a. control pressure regulator).
I put the fuel pressure gauge on and started the fuel pump with a jumper from
the battery. Control pressure was 0.5 bar at first, _very_ gradually
increasing to around 3 bar. Once the warm-up regulator was warm, the engine
started first time, every time. I can imagine that this problem is very
sensitive to ambient temperatures.
Committee Member, UK Audi [ur-]quattro Owners Club