Re: Erratic Idle Latest News - Saab 900 Bulletin Board - Saabnet.com
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Re: Erratic Idle Latest News
Posted by Bill N [Email] (more from Bill N) on Sat, 6 Jan 2001 13:49:38
In Reply to: Erratic Idle Latest News, Alain(Luxembourg), Sat, 6 Jan 2001 13:09:03
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Still sounds like a vacuum leak.
Have you sealed up the gromets through which the vacuum fittings are inserted into the intake manifold?
The metal nipples to which some of the hoses attach to the throttle body can come loose from the throttle body and leak. Have those been carefully inspected?
Also, has the throttle body been cleaned?
How about a defective gasket on the intake manifold? I'm told that you can test with a propane torch. Open the valve, but don't ignite. Place the nozzle out of which propane is flowing near the site of the suspected leak. If the gasket is leaking, propane will be sucked in and cause rpm to increase.
Good luck!
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