Question about 1991 Cadillac DeVille

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1990 deville, replaced ecm, fuel pump, filters,

1990 deville, I have replaced the ecm, fuel pump, filters, relay..still no fuel to rail. Fuel sentry is reading 8 gals, then goes to a flashing "E".

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  • honeymokey
    honeymokey May 11, 2010

    Check connectors at pump for power or broken wire.

  • Anonymous Mar 16, 2014

    how do you flash an ecm in a 1998 deville

  • Anonymous Mar 16, 2014

    how do you flash an ecm after puting a new one in a 1998 deville



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I had same problem in my 90 deville. Drove myself crazy, I replaced the sending unit in the tank with a new fuel pump. I also had to replace the fuel pressure regulator, which sits behind the rail system. It worked for me.

Posted on Jul 13, 2009


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Wow...BIG problem...I'd say you have a bad ECM - maybe you hooked it up "hot"? otherwise, check all grounds for secure connections.
Good Luck

Posted on Jun 14, 2009


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