Fuel pump check valve

Eyvind Spangen eyvind.spangen at c2i.net
Sat Sep 14 00:03:20 EDT 2002

On Fri, 13 Sep 2002 16:25:31 -0400, you wrote:

>This is too weird for words! Twenty minutes ago I was walking into
>the house with exactly the same question on my mind. You're as bad as
>a wife, Eyvind. :-)

Well, you never knew! :-))

>We have a car with a very quiet, original-style fuel pump, but the
>warm starts are maddening. I agree with Dave Kavanaugh's answer, but
>I wonder just which temp sensor (G60?) does the CPU use to make its
>decision about whether to use its "cold-start" program, or not. Since
>replacing the check valve appears to require complete fuel-pump
>removal (don't ask how I know), I had an idea that a "quick fix"
>might be to install a switchable resistance wired to the sensor
>circuit--it could be switched on (momentary switch) when needed to
>produce the resistance that told the ECU: "Brrr, cold temp! Shoot the
>juice to me, Bruce!"

Exactly my problem! My fuel pump is quiet and working great, I don't
feel like replacing it yet.. :-)

I think the sensor in the rear of the head is used.. I'm thinking
about replacing it just to check, it's pretty inexpensive..

If I only could find a diagram showing what the resistance in the
sensor should be at different temperatures.. The car starts just fine
when cold, no matter if it's -20 or +30 (C), but if it's warm and has
been sitting for more than 10 minutes, it's almost dead..

E. Spangen
'89 Audi 80 2.0E quattro
('90 Audi 200TQ20v - garasjedronning)

More information about the 200q20v mailing list