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  1. #1
    Sam Carlson
    Tutorial Bot euromobile900's Avatar
    Join Date
    14 Aug 2010
    Location
    Medford, MA
    Posts
    683
    Saab(s)
    '90 900 LPT with a flat-nose conversion
    Thumbs Up:   2

    Ticking noise under hood, NOT lifters or APC solenoid.

    Here's something that might be easy for someone with more experience with these cars. My '98 CSE makes a ticking noise that is NOT lifter tick. It comes and goes in 20-30 second intervals, ticks about 8 times a second, same speed regardless of engine revs or road speed, seems like it's coming from the passenger side (right side of car) toward the rear of the engine bay, behind the firewall but not in the cabin. A few things come to mind. Do these cars have an electric vacuum pump for cruise control? Or is there some relay or solenoid controlled vacuum valve I should look at? The APC solenoid is working fine, makes a slightly different sound that's not very audible with the hood shut.

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  2. #2
    Kirsty McCarthy
    Saab Fan 3MaSaab's Avatar
    Join Date
    27 Nov 2012
    Location
    USA
    Posts
    11
    Saab(s)
    1997 9000 CSE
    Thumbs Up:   0
    It's not the fuel/charcoal canister clicking?... I hear mine the most when I'm idling like in the bank's drive thru.

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  3. #3
    Sam Carlson
    Tutorial Bot euromobile900's Avatar
    Join Date
    14 Aug 2010
    Location
    Medford, MA
    Posts
    683
    Saab(s)
    '90 900 LPT with a flat-nose conversion
    Thumbs Up:   2
    I don't know. Could be! I'll check that valve. Where is it located?

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  4. #4
    Saab Nut
    Join Date
    06 Mar 2011
    Location
    Westport, Pennsylvania, United States
    Posts
    410
    Saab(s)
    93 9000 CSE, 85 900T
    Thumbs Up:   1
    Quote Originally Posted by euromobile900 View Post
    I don't know. Could be! I'll check that valve. Where is it located?
    Inside the passenger side wheel well forward of the mud wall in front of the washer fluid tank. Fun access.

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  5. #5
    Sam Carlson
    Tutorial Bot euromobile900's Avatar
    Join Date
    14 Aug 2010
    Location
    Medford, MA
    Posts
    683
    Saab(s)
    '90 900 LPT with a flat-nose conversion
    Thumbs Up:   2
    Well, I'm changing that fender soon due to rust! Convenient...

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    Ask me a question about your c900! I promise I either can answer it or know someone who can

 

 

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