Fuel pump check valve

Phil Rose pjrose at frontiernet.net
Fri Sep 13 17:25:31 EDT 2002

At 6:27 PM +0200 9/13/02, Eyvind Spangen wrote:
>If the cause for hard starting with a warm engine is a bad fuel pump
>check valve, why does it fire right up when cold?

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. :-)

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!"

[I know someone is gonna say they can do a complete pump replacement
in less time than it will take me to add the circuit I've proposed,
but I don't believe you, and this would be far more fun to do,
anyway] :-)


Phil Rose				Rochester, NY USA
'91 200q	(135 Kmiles, Lago blue)
'91 200q   (58 Kmiles, Tornado red)
	mailto:pjrose at frontiernet.net

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