Jerkiness, hesitation, unstable idle - Saab 900 Bulletin Board - Saabnet.com
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Jerkiness, hesitation, unstable idle
Posted by EDZ (more from EDZ) on Sun, 4 May 2003 09:07:05
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My '84 turbo (191K miles) has developed, over the past couple of months, a slightly unstable idle and some jerkiness when maintaining a steady, low speed. Also I notice some very slight hesitation going up hills. I live in Colorado at 5400 feet altitude, but this behavior developed considerably after I moved here so I don't think it's an altitude effect.
First thought was O2 sensor, since it was very old. Replaced it; no effect. What did seem to improve things was putting in a tank of premium gas. This car, though, had been happy for years with mid-grade. Anyone have an idea what might have changed? I'm happy to spend the few cents extra at the gas pump, but I'm worried that something more fundamental might be wrong. The engine is not using oil, nor do I see any froth on the dipstick.
posted by 198.11.1...
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