Re: HOW TO ADJUST IDLE SPEED? (long) - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: HOW TO ADJUST IDLE SPEED? (long)
Posted by Dean (more from Dean) on Sat, 1 May 2004 07:15:10
In Reply to: HOW TO ADJUST IDLE SPEED? (long), Joshua, Fri, 30 Apr 2004 18:47:16
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The ECU controls the speed by monitoring the crankshaft sensor signal. It uses the IAC to change the idle air flow. Air also gets past the closed throttle. If the throttle is not postioned properly, the air flow needed can be out of range for the IAC. BUT before changing the throttle stop, as last resort, you must first do the following maintenance items:
- clean the TB, oil the pivots after if you use a spray
- clean and oil the IAC
- clean the injectors, Techron Concentrate
- new plugs properly gapped
You will not be adjusting the idle speed, just allowing the ECU to control it better.
posted by 68.95.72...
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