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Discussion Starter · #1 ·
We bought a 2001 S10 that needed a fuel pump. We replaced it, and new tank and filler tube. Pump not coming on. Cranks won't start.

Next was we traced all wiring, especially grounds, nothing.

Then we were told it was the ignition module. Replaced that too, still not engaging the pump
I'm losing my mind, and bleeding money. Anybody have suggestions?
 

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Have you tried applying power to the pump prime terminal in the fuse box? If that turns the pump on, you can at least eliminate the wiring to the pump, the ground, and (if it starts) the ignition module.
 

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Did you spray starter fluid down the throttle body?
 

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If it will not fire with starting fluid, you have a separate issue as in little or no spark.
 

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The ECU commands the fuel pump on, by turning the fuel pump relay on, which is protected behind a fuse. Did you check that fuse and relay? In the fuse panel, as mentioned by TomA you can apply power to the test port to see if you can force the pump on that way, If so then you know the wiring from the fusebox to the fuel pump is good, if it doesn't work then you need to look into that circuit/harness.
 
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