1987 brougham vacuum quesiton

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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1987 brougham vacuum quesiton in Past Cadillac Vehicle Discussion; HI, I noticed when out in the garage checking out vacuum lines that I had a line that was just ...
  1. #1
    outsider is offline Cadillac Owners Connoisseur
    Automobile(s): 87 Brougham, 1969 Calais, 95 FWB, 05 CTS, 07 SRX
    Join Date
    Sep 2009
    Buxton, Maine, United

    1987 brougham vacuum quesiton


    I noticed when out in the garage checking out vacuum lines that I had a line that was just plugged with a bolt. It's been that way since I bought the car. Looking at Sven's diagram it looks to be TOP SOL #3 which goes to the carb. Looking on my carb, I see what looks like a vacuum nipple with nothing attached.

    My question is: Why would someone disconnect this vacuum line? Is there any reason for that? The car usually runs fine but at times it does run rough so maybe this line could be the key. Any thoughts or ideas?

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  3. #2
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
    Join Date
    Jan 2008

    Re: 1987 brougham vacuum quesiton

    Not sure what its for and the service manual doesnt have a vacuum diagram. I'd bet its full vacuum supply to the TOP SOL to control the EGR.

  4. #3
    Cadillac Giovanni's Avatar
    Cadillac Giovanni is offline Cadillac Owners Enthusiast
    Automobile(s): 86 DeVille (RIP), 89 Brougham D'Elegance, 95 FWB
    Join Date
    May 2006
    Westport, MA

    Re: 1987 brougham vacuum quesiton

    I disconnected the line to my EGR valve and plugged it with a screw. The valve was brand new, but when it was connected, it ran like crap (but passed emissions). After I passed, I plugged the line again and left it off. Not sure which line it was on the diagram, but I think it was 4. Not sure if 3 is related in any way, but it could be a reason.

    Try plugging it back in and see what happens!

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  6. #4
    sven914's Avatar
    sven914 is offline Cadillac Owners Connoisseur
    Automobile(s): 1989 Brougham d'Elegance, 1985 Fleetwood Brougham *Coupe*
    Join Date
    Dec 2008

    Re: 1987 brougham vacuum quesiton

    Probably what happened, was the hose dry-rotted or otherwise started leaking, so somebody cut off the end and plugged it.

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