Question about 1991 Oldsmobile Cutlass Supreme

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I have a '91 Olds Cutlass Supreme, 3.1 v6. It will start and run about 5-15 minutes then die. Almost smells like it's running rich. When you try To start it back up it may start or it may not. I have replaced the fuel pump/sending unit. new plugs, I even have spark after it dies. Any other ideas. For the record, It's been parked for 2.5 years, and has 145,500 miles.

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  • dpotts30 Nov 10, 2010

    had To drop fuel tank, the only old fuel would have been in the line from The fitler to The fuel rail. I know it has fresh fuel up to the schrader valve on the fuel rain.

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  • 134 Answers

May just be bad fuel If it has sat for that long. your fuel can be restored with an additive you can get from any auto parts store.I would try that first to rule that out.

Posted on Nov 10, 2010

  • par sims Nov 11, 2010

    I would still suggest becausr it has been sitting so long you can run some fuel injector cleaner thru it that can make a big difference sometimmes.

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