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5.0 and 5.7 Discussion, check engine light on in Cadillac Engine Technical Discussion; Hi again....Thanx for all the replies... I just installed a chrome edelbrock air filter on my 92 brougham 5.7, and ...
  1. #1
    92cadbro is offline Cadillac Owners Member
    Automobile(s): 1992 Cadillac Brougham 5.7L
    Join Date
    Jun 2005
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    Montreal, Quebec, Canada
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    check engine light on

    Hi again....Thanx for all the replies...


    I just installed a chrome edelbrock air filter on my 92 brougham 5.7, and it gave me the check engine light....I was wondering what caused this...Vaccum leak maybe?? (there were 2 tunes attached to the original air box)

    Thanks

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  3. #2
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
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    Rockford, IL
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    Re: check engine light on

    What is the code? Did you lose the IAT sensor?

  4. #3
    90Brougham350's Avatar
    90Brougham350 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
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    Re: check engine light on

    There is one vacuum hose that runs from the vacuum port on the driver's side of the throttle body. This controls the stovepipe heating unit for better cold driveability. You've essentially got a vacuum leak in the engine without it. Second is the IAT sensor. This plugs into the bottom of the stock unit pointing up. You want this, the computer relies on input from this to properly advance the timing, if memory serves me correctly.

    Brian

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