Question about 1996 Chevrolet Impala SS

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I have a customer with a serious problem! He's also my cousin> He ran his impala out of fuel four days ago and it burned up the factory original fuel pump. I replaced it and then two days later the pump stopped on him while driving and was followed by a cloud of smoke entering the vehicle from the fuse box side of the engine bay! I replaced the pump again, fixed the problem with the fuel level sending unit and replaced the tank back into position.......Still no pump turning on to prime nor will it turn on with the jumper under the hood next to the evap/dryer in front of the fuse box! How do I bypass the oil pressure sending unit cut off switch

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When you replaced the pump, did you replace the pump relay? I'm concerned with the smoke...That may indicate more than a minor electrical problem. You need to find the exact source of the smoke and pretty much stop attempting to start the car by bypassing stuff. That said, likely when you correct the short, it will most likely restore the fuel pump electrical as well, since that's where the problem began.
Check all wiring near where the smoke came from for signs of overheating, check the pump relay and fuse and check any fusible links to make sure everything is intact and as it should be. Without knowing exactly what shorted, creating a bypass or "work around", can back-feed power to somewhere it can do more damage to sensitive computer circuits. Aside from the pump problem the vehicle had no other don't want to make any new ones.
I know I'm not telling you what you want to hear. That's because even if I was right there, I'd need to begin tracing wires and doing pretty much what I outlined.
In electrical work, there is no guessing, and once you see smoke you know you are on dangerous ground and at risk of melting down the harness or other expensive items. It may turn out to be something simple but you need to be sure.

Posted on Sep 08, 2009

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