Vacuum/Boost guage acting weird... and now no boost! - Saab 900 Bulletin Board - Saabnet.com
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Vacuum/Boost guage acting weird... and now no boost!
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Posted by ebarter [Email] (more from ebarter) on Wed, 31 May 2006 15:45:24 Share Post by Email
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Since I bought my car in October, the boost gauge has acted strangely, and now I've confirmed that it is not the gauge itself. When at idle or under engine braking the needle sits at atmospheric pressure, but when I blip the throttle or accelerate mildly the needle goes pretty far negative. When under boost the gauge goes positive as it should, although since yesterday I suddenly get a mere 2-3 psi of boost, max. (Before it would boost to the yellow/red line) Additionally, when I shift after being on boost the gauge pops up further positive for a second. I replaced all the vaccum lines with silicone earlier this year. Could something be hooked up wrong? Clearly the engine isn't idling w/out vacuum. My cruise doesn't work either. I guess I'm mostly puzzled at my sudden loss of boost, especially since I got mid-yellow before with the APC unplugged. Any help would be appreciated, thanks,

Emery

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