1995 Cadillac DeVille Logo
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Maurice Geddies Posted on Mar 16, 2016
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This car will not start. The fuel is not getting through. It tries to turn over but won't. The fuel pump is working fine. I'm considering replacing the carburetor and/or all of the fuel injectors.

I replaced the fuel filter installed correctly, fuel modulator, fuel regulator and fuel pump relay.

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deucesmommie

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  • Cadillac Master 260 Answers
  • Posted on Mar 19, 2016
deucesmommie
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Are any of the lights on our dash on??? It might not be your fuel pump.... It may be your security system failing.. Check out this site... your car is on it year make and model for this problem.. It happened to my impala. It would turn over but not start sometimes. Its really common in gm cars! Read up on it an see if this may be it. I hope this helps ya Do It Yourself GM Security bypass

David Harrelson

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  • Cadillac Master 5,456 Answers
  • Posted on Mar 16, 2016
David Harrelson
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But did you actually test fuel pressure at key on? If not, how do you know the pump is working fine? Just because it runs, does not mean it is ok.

Testimonial: "I disconnected the fuel filter and turned the key to see if fuel was coming out and it was."

  • David Harrelson
    David Harrelson Mar 18, 2016

    Not good enough. On fuel injection engines you need BOTH correct volume, AND correct pressure. Many parts stores will loan test gauge kits. This is a common problem, and incorrect (low) pressure can be bad pump, bad regulator or even bad relay or filter.

  • Robert Wood
    Robert Wood Mar 18, 2016

    As David said it needs testing with a gauge and a closed system with pressure built up.The volume and pressure both will let you know for sure.

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Next, the fuel pump may be worn out. Usually they just stop working (running).
Next, check the fuel pressure regulator. Usually located on the front fuel rail, drivers side.
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Have you hooked a scanner to the computer and checked the oxygen sensor(s)? If they are bad they could lean out the engine.

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