Stumbling Idle with A C compressor engagement - Saab 9000 Bulletin Board - Saabnet.com
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Stumbling Idle with A C compressor engagement
Posted by Mike Johnson (more from Mike Johnson) on Thu, 17 May 2012 10:50:06
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Hi Everyone,
1996 131k. IAC has been cleaned in last several years by PO. When AC engages, say, at a stoplight, the idle drops too much. It does not do it with ECON and the idle recovers fine from putting the car in and out of gear (Auto Trans). Voltage is not super high anyway 12.9 maybe. My old car carried low 14s. Am I looking at the IAC or similar, or is the clutch drawing too much, AC fan drawing too much, alternator not sufficient etc? I have looked for obvious vacuum leaks, but have not dug beyond my knowledge level. Suggestions welcome.
Thank you, Mike Johnson
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