Temporary lack of power during acceleration - Saab 9000 Bulletin Board - Saabnet.com
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Temporary lack of power during acceleration
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Posted by JayK (more from JayK) on Fri, 29 Jun 2001 18:24:14 Share Post by Email
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'91 9K CDT 147K miles
Would appreciate diagnoses advice on a puzzling problem.

I am experiencing a short lull in power delivery during acceleration. Maybe one to five seconds and then power suddenly comes back in a surge. Happens intermittently. Boost gauge is showing normal boost levels, even during the power lull. This is not the "missing" that I had when my Ignition cassette went bad. It almost seems like some automatic system is cutting back on the throttle. BTW I do not have TCS.

Problem developed after I accidentally snagged an empty garbage bag that was flying around on the freeway and the bag melted all over the exhaust's bellows expansion joint. I got under and had to use a Propane torch and scraper to get the stuff off. I cant help thinking the rocking and pushing on the exhaust and engine may have loosened or cracked a vacuum hose. Checked vacuum hoses and everything seems good (as far as I can see). I disassembled and cleaned the compressor dump valve (hooter valve?) but problem persists.

Going under the car again tomorrow to take a look from that end. Any suggestions of what to look for?

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