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91' 940 Extreme RPM surge up and down when using cruise control and then engine failure... 900 1991

posted by  Don Foster on  Thu Jan 17 01:11 CST 2002
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last visit: Sun Oct 5 11:53 CST 2014
[RELATED]

If you're cruising on the highway, the engine should be coupled firmly to the transmission through either the clutch or the lock-up torque converter. For the engine to race from 2600 to 4000 rpm suggests that the engine and tranny are decoupled.

This doesn't sound like a cruise control problem.

Is the tranny fluid level proper?


Don Foster (near Cape Cod, MA)






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