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Old 02-24-2003, 10:08 AM
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JBronco JBronco is offline
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Sticking fuel pump relay in cold weather?

1990 5.8 auto. My fuel pump did not want to shut off this morning, it was very cold, about minus 5 degrees. When I turned the truck off, the fuel pump kept running. I went under the hood and jiggled the wires marked "fuel pump," next to where you attach the code reader on the drivers side inner fender. This made it stop.

One more thing, the truck had a coolant leak this morning, it seemed to be from a hose clamp, so we tightened them all and sprayed the engine down to get the coolant off. Maybe water got into the relay and since it was so cold, it did not dry? Actually, is that the relay that I jiggled, and if so, is it replaceable?
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Old 02-24-2003, 06:01 PM
BOJOFASO BOJOFASO is offline
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Sticking fuel pump relay in cold weather?

hey jbronco
my 91 used to do the same thing. the relay would stick and the fuel pump would not shut off. yes it is replaceable. let me go outside and get the part number for the relay. E3TB9345A2A i think it was about 30 dollars. you dont have to go to ford but i did.it was a pain to get it un cliped from the mount. hasnt stuck since i changed it.
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Old 02-24-2003, 06:03 PM
BOJOFASO BOJOFASO is offline
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Sticking fuel pump relay in cold weather?

hey j bronco
how did you make out with the relay you were going to install last month?
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Old 02-24-2003, 06:36 PM
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JBronco JBronco is offline
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Sticking fuel pump relay in cold weather?

Thanks. I will keep my eye on it and if it happens again I will replace the relay.

I never needed that relay, it turned out that a bad ignition switch was the source of my problems. But thanks for the tips. I kept the 70 amp relay that I special ordered from JC Whitney, you never know when you might need something like that and they are not available locally.
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Old 02-25-2003, 06:31 PM
saanders saanders is offline
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Sticking fuel pump relay in cold weather?

Do what BOJOFASO said and get the new relay. It fixed my '90 5.8L Bronco. I think they have a TSB on it, but I never ran across it.
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Old 02-26-2003, 09:04 AM
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JBronco JBronco is offline
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Sticking fuel pump relay in cold weather?

This has not happened again, I think it just got wet/icy from when we hosed the engine down in the morning after fixing the leaky hose clamp.
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Old 02-26-2003, 09:04 AM
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