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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, bad problems in Past Cadillac Vehicle Discussion; ok i have a 91 sedan deville with 220k miles on it... ran good up until a few days ago.. ...
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    rainingzigzags's Avatar
    rainingzigzags is offline Cadillac Owners Member
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    bad problems

    ok i have a 91 sedan deville with 220k miles on it... ran good up until a few days ago.. it starts to surge as it is going down the road...now it is getting worse as it is backfiring now when it does.. not loud though but it does.... if i let off the gas it stops doing it but once i hit the gas it acts up again...i am at a lose for ideas on this one

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    illumina's Avatar
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    Re: bad problems

    try scanning for codes on the OBD (onboard diagnostics) first, turn you key to the "on" position without starting the car. second, press the off and warmer buttons on your climate controll panel. third, look over to the fuel data center, there you will see a list of numbers pop up that look like similar to this...e037 and so on. copy those numbers down and post them here, someone will help with this, then we'll work from there.

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    Re: bad problems

    the codes it came up with are f11, f48, 7.0 , e12, e11, e96 i have a hand scan tool for the car i could use but i doubt that would make any sence to me...

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    Re: bad problems

    f11=a/c temp sensor fault (high side)
    f48=a/c sytstem fault(low refrigerant pressure.)
    7.0= Thats is not a code. Its another part of the computer system.
    e12=distributor signal fault.
    e11=no such code
    e96=torque converter overstress fault(driver induced sympton caused by applying brakes and the accerlator at the same time)

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    Re: bad problems

    ok so how would i go about fixing it lol distributor signal fault.. wtf is that all about?

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    illumina's Avatar
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    Re: bad problems

    Quote Originally Posted by rainingzigzags
    ok so how would i go about fixing it lol distributor signal fault.. wtf is that all about?
    first, look under the dist. cap and look for any loose, coroded, or damaged wires. make sure the ignition module is tight and clean. follow the dist. wiring outside the cap too. spray some electrical contact cleaner on the weatherpack connections and make sure you hook them up tight. also, you may do well to get a haynes manual for the car, and look up on how to test all of the distributor components. because there may be a good chance that the pick-up coil may be going out. i would tell you how to check here, but the pictures in a haynes manual are much easier to follow, and you could probably get one on ebay for like 5 bucks.
    on another note, you stated in you earlier post that you had a "surge", right? that can be caused by a fuel pump that is going bad, an intake air leak, or a defective ecm. look and make sure that all of your vaccume hoses from the throttle body are connected and in good condition.you may also want to make sure your fuel injector wire connections are clean and tight too. good luck.

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    Re: bad problems

    just replaced the cap and rotor tonight and it seems to be alright now... hope i never have to do that again.. it was a pain in the ass with those tiny ass bolts lol lets just say thank god they gave me extra with the cap

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