1992 Cadillac Brougham Starting Issues??????????
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5.0 and 5.7 Discussion, 1992 Cadillac Brougham Starting Issues?????????? in Cadillac Engine Technical Discussion; I recently purchased a 1992 Cadillac Fleetwood Brougham RWD with the 5.0 Chevy engine. On the drive home car was ...
  1. #1
    CaddyGI is offline Cadillac Owners Member
    Automobile(s): 1992 Brougham
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    Question 1992 Cadillac Brougham Starting Issues??????????


    I recently purchased a 1992 Cadillac Fleetwood Brougham RWD with the 5.0 Chevy engine.

    On the drive home car was hesitating and would only go when gas pedal floored and only start this way.
    After installing new plugs, new wires, new distributor, car wouldn't start at all.
    Found out to much gas is flooding replaced fuel regulator and same problem
    had throttle body rebuilt and new injectors car ran for ten minutes or so then engine idle started to pick up and car eventually flooded out, also noticed catalytic converter turned red hot. Haven't tried to start again since i have to clean the plugs of excessive gas and build up each time.
    I know its alot but any help

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  3. #2
    creeker is offline Cadillac Owners Connoisseur
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    Re: 1992 Cadillac Brougham Starting Issues??????????

    Quote Originally Posted by CaddyGI View Post

    I recently purchased a 1992 Cadillac Fleetwood Brougham RWD with the 5.0 Chevy engine.

    On the drive home car was hesitating and would only go when gas pedal floored and only start this way.
    After installing new plugs, new wires, new distributor, car wouldn't start at all.
    Found out to much gas is flooding replaced fuel regulator and same problem
    had throttle body rebuilt and new injectors car ran for ten minutes or so then engine idle started to pick up and car eventually flooded out, also noticed catalytic converter turned red hot. Haven't tried to start again since i have to clean the plugs of excessive gas and build up each time.
    I know its alot but any help

    What's the mileage?.

  4. #3
    mjs182004's Avatar
    mjs182004 is offline Cadillac Owners Enthusiast
    Automobile(s): 91 Brougham d' Elegance, 06 STS-V
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    Re: 1992 Cadillac Brougham Starting Issues??????????

    Have you changed the fuel filter?

  5. #4
    VortecCaddy is offline Cadillac Owners Member
    Automobile(s): 1990 Cadillac Fleetwood Brougham
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    Re: 1992 Cadillac Brougham Starting Issues??????????

    You may want to cheeck the EGR valve and its vacuum lines. One way to tell would be to disconnect the vacuum line going into the EGR itself. I had this happen and it threw no codes at all.

  6. #5
    CaddyGI is offline Cadillac Owners Member
    Automobile(s): 1992 Brougham
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    Thread Starter

    Re: 1992 Cadillac Brougham Starting Issues??????????

    116,000 miles on car

    Haven't checked egr valve will look into it
    Gas Filter was replaced during tune-up

  7. #6
    AJxtcman's Avatar
    AJxtcman is offline Cadillac Owners Connoisseur
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    Re: 1992 Cadillac Brougham Starting Issues??????????

    I replaced a lot of coils back in the day on these cars.

  8. #7
    steelybill is offline Cadillac Owners Enthusiast
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    Re: 1992 Cadillac Brougham Starting Issues??????????

    Maybe a long shot here, but the converter may be part of the problem (??) The fuel injector pulses are a function of the computer (ECM) and the distributor module. It may well be the module getting close to failure (been there) The fact that the idle picked up speed seems like it went lean, but that doesn't agree with what you say about flooding etc. Idle air control is supposed to control that speed I believe ( it's screwed in the side of the throttle body)
    How about a leak in the injector seal ring(s) in the throttle body ?
    If the throttle position sensor is wacky the ECM wont control idle.

    The other common problem with all cars; leaky/old/cracked vacuum hoses. Do a GOOD visual inspection of everything, and push/pull things to make sure they are secure and not loose, cracked etc.

    Like VortecCaddy said, the EGR valve may be open at idle (not good/ stuck etc) and cause a rough idle.
    Lots of stuff can affect this problem.

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