Date: 26 Nov 2001 12:04:16 -0800
From: (Jonah)
Subject: Re: 84 900 Rough Warm Idle

Thanks for the suggestion, Tony. As it turns out, when I cleaned the black gunk off of the throttle body with WD-40, the problem went away for the most part. Instead of hunting between near stall/stall and 1200, it is now pretty steady at 900-1000. I also noticed that my newly replaced front exhaust pipe has a slight leak at the gasket where it attaches to the manifold. Once I get that fixed, I'm hoping it will idle steady again. Thanks. Jonah "Tony at" <> wrote in message news:<9tn3da$7kpt$>... > The most likely problem is the warmup regulator. > They have the symptoms you describe when they are failing. > > Tony > "Jonah" <> wrote in message > > > Greetings loyal Saab owners. My 84 900 has 231K, burns no oil and has > > run perfectly until now. Cold idle runs fine, but once the car warms > > up, idle is erratic. I have checked many posts to this group and > > cannot investigate the likely culprit since there is no AIC on an 84 > > 900. In trying to diagnose the problem by looking for vacuum leaks, > > turns out if I pull off the small vacuum line from the manifold, the > > car goes from rough idle to a smooth idle. This tells me that I don't > > have a vacuum leak, but instead, something that is supposed to turn > > on/off after the car warms up isn't. Any suggestions? Thank you in > > advance. > > > > Jonah

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