check engine light on

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5.0 and 5.7 Discussion, check engine light on in Cadillac Engine 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
    Montreal, Quebec, Canada

    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)


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  3. #2
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Rockford, IL

    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)
    Join Date
    Jan 2005
    River Falls, WI

    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.


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