Thread: fuel pump relay
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Old 03-26-2003, 09:13 PM
maheath maheath is offline
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Join Date: Sep 2001
Location: Austin, TX
Posts: 563
Hearing the pumps run is certainly a good thing, but that doesn't mean the fuel pump relay is good. One symptom of a bad fuel pump relay is stalling at anything but idle in a KE-Jetronic system. Obviously, the car needs to have been started for this to happen.

If you suspect a fuel pressure/delivery problem, you need to hookup a fuel pressure gauge. Anything else is just guessing.

Personally, if the car is not starting, I'd check the ignition system first. I'm assuming that you've already done that.
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Mike Heath
1988 560SL Black/Palomino
1988 300SEL Black Pearl/Burgandy
1984 500SEC Anthracite Grey/Palomino
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