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91 S10 fuel pump problem


scott flynn
02-15-2005, 11:49 AM
I have a 91 S10 w/ 2.5/5 speed trans. It ran good but had a hardtime starting, I took engine out, replaced rear amin seal and throwout bearing. now everything is put back in a nd hooked up, the fuel pump is not kicking on, the pump runs and works when you put 12v to the test wire in the harness, it does not kick on when you turn the key on. I tried a different relay, computer, fuel pump, but nothing. All my ground wires are hooked up.

jackass#1
02-15-2005, 02:33 PM
something isnt connected. check it all over again, or your wiring could have exposed wires and hitting a metel surface grounding it out.

BlazerLT
02-16-2005, 02:34 AM
neutral / clutch safety switch.

scott flynn
02-16-2005, 07:00 AM
are there any wires I could have missed?? I plugged in the distributor, coil(there are two sockets that plug into it), oil pressure switch for the fuel pump that is on the pass. side of the block, the three plug ins on the top of the manifold on or near the throttle body, one plug in on the thermostat housing, one on the pass. side of the TBI unit, mass air flow sensor is plugged in, the two sockets that go the the trans are plugged in, and the ground wires are grounded. The is a larger gauge black one, a tan wire with a black/white wire with the same end, this should be for the fuel pump, a small tan wire and the ground strap to the firewall. Those are all grounded on the back head stud. These are all of the connections that I took off. I also connected the wires for the fuel injector. The starter and alt. are all hooked up as well. It runs fine if you dump gas down the throttle body, but the fuel pump won't kick on when the key is turned. The realy is getting power from the orange hot wire that runs from the battery, but it is not getting juice from the green/white wire that comes from the ECM.

scott flynn
02-16-2005, 08:38 PM
it was just a blown ECM fuse.

BlazerLT
02-16-2005, 08:41 PM
hold on there, the question is, what caused the power surge to cause that to pop?

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