Question about 2000 Chevrolet Cavalier

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2000 chevy cavalier wont turn over

I bought a fuel pump, tested it with 12 volts and installed it. got no sound from pump, checked relays, fuses, battery power, plenty of gas (if it were on e, the tank wouldnt have weighed 80 pounds), the relay and fuse both have power, the pump works (jumped it with wire from the battery, creates pressure, car starts, no leaks!) followed the wires all the way from the pump to relay, mo bumps breaks or gouges. i have checked everything and more. I even checked the old pump and it actually works. I guess on to my question, is there something in the car that will block the voltage from getting to the fuel pump? I have heard pcm and crankshaft sensor, If so would you be able to describe the procedure to narrow it down to one or the other or a possible solution to the issue. Thank you in advance for your time and help.

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  • Contributor
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I had the same problem. It turned out to be the anti-theft the car has. I undid the battery terminals for 30 minutes and it started right up

Posted on Mar 29, 2014

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  • Chevrolet Master
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Firstly check if you have a pressure sensor in the fuel manifold . If you have then it controls power to the ECM to the pump relay to the pump and switches the pump off when fuel pressure in the manifold is reached . Also check for a fuel emergency shut off switch that you may have to reset

Posted on Mar 29, 2014

Testimonial: "thank you for a quick response, there is no fuel pressure in the manifold, i disconnected the fuel line from the engine to make sure. not sure about the fuel emergency shut off switch. i would say the main problem is that there is no power going to the fuel pump other than the 5v constant. the wires that are supposed to carry the 12v are all new and free of defects. if i "jump carry" the 12v from the battery to the relay, i get power to the pump no problem."

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2 Answers

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