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Erratic Idle and hot start issues V70-XC70

posted by  metzger XC90 V8 on  Sun Jul 7 13:16 CST 2013
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last visit: Sat Oct 4 17:44 CST 2014
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My son's 1996 850 has developed a slight rpm surge at idle. It goes from 900 rpm to 1500rpm and back, even when warmed-up (although it does this less when warm).
At the same time, it developed a problem starting hot. It starts fine cold, but drive it 15 minutes, shut it off, and it won't restart. It cranks, and acts like it's trying to start. But, it won't actually start unless the engine is cool. Vacuum lines were replaced 20k miles ago.

Will the engine coolant sensor cause these problems? What are the OHM readings for a good ECT?

What will unplugging the air mass sensor tell me?

Thanks!!






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New Erratic Idle and hot start issues [V70-XC70]
posted by  metzger XC90 V8  on Sun Jul 7 13:16 CST 2013 >


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