Re: Car will not Decelerate! - Saab Sonett Bulletin Board - Saabnet.com
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Re: Car will not Decelerate!
Posted by Andy in PDX [Email] (more from Andy in PDX) on Fri, 28 Jul 2006 00:33:38
In Reply to: Car will not Decelerate!, Nick Nillo, Thu, 27 Jul 2006 11:28:39
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Does the car still have the deceleration valve on it that is supposed to hold the idle up for several seconds? It is a squarish block, just forward and to the left of the carb, that is about three inches high with a 3/8" hose attached that goes to the opposite side of the carb and a funny shaped adjustment screw on the top (the funny screw takes a special tool to adjust). It is attached to the intermediate plate between the carb and the manifold, and it has a diaphragm inside the base. The carb has to come off to get to the diaphragm. One good backfire and that diaphragm is toast, causing a big vacuum leak. if the carb is adjusted rich, then the vacuum leak would lean it out and bring the idle up.
Most of us disable the decel valve.
posted by 209.102.125...
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