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Old 11-14-2004, 12:53 AM

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help fuel pump not working

A guy my wife works with has a 93ish chevy s10/s15 blazer with the 4.3l in it... he parked it at work today and now it won't start... turns over great, has spark, but doesnt have fuel... is there a "momentum switch(not sure if this is what its called) that will kill the power to the fuel pump if the car is in an accident in one of these trucks... and if there is is there a reset switch somewhere, that someone may be able to tell me where it is? (the fuel pump makes no noise when you turn the ignition on, this is why i'm wondering)

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Old 11-14-2004, 08:36 AM
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Fuel Pump

The pump is controlled by a relay and the ECM. There is a fuel pump prime connector which should be located looking in at the motor on the right side up by the cowl. A single red wire with a black connector. You can run a jumper wire from the positive side of the battery to it and see if the pump will run. If it does not then the pump is bad. If it does run you probably have a relay out or a ECM command signal lost. 95% of the time it's the pump. Reach under the tank and tap it with a rubber hammer sometimes it will "jar" the pump to run a little but if it does start when doing this it is not a fix it still needs a pump.
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Old 11-14-2004, 08:15 PM
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restore60s is right on the money, good advice.
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Old 11-15-2004, 04:59 AM
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g switch

Doc here:

In addition to the good advise Restore 60's gave you...

Is that a 4X4? I think they did have a "G" switch or "invert" switch in case of rollover or hard hits...Not for sure on the Blazer though...I know Ford is a Big believer in them...

If you had one, look around the rear seat bottom, or rear deck, or follow the wires up from the tank, It shouldn't be far from the pump.

If you do find one, post back and let me know! Curious....

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