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On 10 Jul 97, Woolston Craig wrote:
I responded:
> >Your car must have been converted to carbs, with the idle shutoff
> >valves leaking or disabled or the carbs misadjusted. Your car is
> >dieseling; that is why all the OE carb setups came with idle shutoff
> >valves.
> The car is Fuel Injected so that rules out the carb problem. But
> when I say fouled I really mean that the plugs are black and ugly,
> not gray. I know from airplanes that lead deposits form in the
> spark plugs and create loss of power. I have also read that they
> lead deposits heat up and can cause preiginition. These plugs are
> black like my VW plugs but the lead deposits are gray like you said.
> Airplanes still use a little lead (100LL, LL for Low Lead) but what
> is causing the black look in my VW plugs.
Black means it is running too rich. When you shut the key off the FI
should completely stop all delivery of fuel. It should not be
possible for it to run on like a carb could (even without spark.)
Okay here are a couple of things to check:
1) When you get in the car and turn the key ON, do you hear one set
of relays clicking, and then ~1 sec later another click?
2) Is the vacuum hose to the Pressure Sensor connected?
3) What kind of gas mileage are you getting?
4) With the engine running at medium speed what voltage do you
measure at the fuse box?
Jim
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Melissa Kepner Jim Adney
jadney@vwtype3.org jadney@vwtype3.org
Laura Kepner-Adney
Madison, Wisconsin
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