Re: This idle problem is going to drive me to drink,,,, - Saab 900 Bulletin Board - Saabnet.com
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Re: This idle problem is going to drive me to drink,,,,
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Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Sat, 17 Dec 2005 10:55:38 Share Post by Email
In Reply to: This idle problem is going to drive me to drink,,,,, Steinway, Sat, 17 Dec 2005 06:35:46
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It sounds like the fuel computer WANTS to keep the idle at 1100 rpm.

Have you checked the ECT sensor for proper resistance at different temperatures? A bad ECT sensor might fool the ECU to think the car is colder than it is and bring the idle up.

Also, you want to have the base idle a little bit lower than 850 with idle motor closed. About 700-750 is better but not lower than that.

Also, check the winding resistance of the AIC with an Ohm meter. It should be 20 Ohm between pin 1 and 2 and pin 2 and 3 and 40 Ohm between pin 1 and 3.

Make sure that you rotate the valve on AIC and take resistance reading at several spots to find bad spots on the commutator/brushes.

Check and clean all ground connections at intake manifold and also over by the ignition module on left inner fender.

Anders

SWEDECAR

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