Date: Sun, 23 Dec 2001 10:44:26 -0000 From: "Grunff" <runffnopsamo.co.uk> Subject: Re: Fast idle on 85 900T
"Taflet" <nospamnopsam.now> wrote in message news:j96a2us8de3c9nuhi5qju4ikhoqpro0j6rnopsamcom... > Hello everyone, > > Last night I decided to run the Saab a bit hard (top yellow range of > the APC gauge) for a short period, and soon after that the idle speed > climbed to around 1900-2000 rpm range. I checked for loose vacuum > hoses, but the idle isn't hunting (as a vacuum leak would suggest) - > it's a racing idle. > > I dropped into the local Saab dealership and he suggested that perhaps > a chunk of carbon got dislodged and is stuck in the idle control motor > - and that I should try taking out for a hard run again to dislodge > it. I've been doing a lot of city driving so that seemed a possible > cause (carbon buildup). I tried going to www.saabnet.com , but the > website seems to be down or something (getting about 5KB/s on my > broadband connection). > > If anyone here has any additional suggestions I could check out, I'd > very much appreciate it. I'm willing to bet it's a vac leak. This happens quite often, when you push a turbo car more than you normally would, you pop off a hose. Vac leaks don't always cause hunting; it depends where the leak is. Check all your hoses, carefully. Use an unlit butane/propane torch around the ends of each hose. When you come to a leaky one, the idle will shoot up. Grunff
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