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Missing at highway speeds 900

posted by  rjritterjr on  Sat Dec 8 01:27 CST 2007
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last visit: Mon Oct 13 18:09 CST 2014
[RELATED]

My 94 940 N/A, 199,850 miles has been intermittently missing at highway speeds for awhile now. It feels like it misses an entire revolution while running at 70-73 mph, steady speed (not accelerating); sometimes also at 45-55, also steady speed, not accelerating. It doesn't happen often, may once or twice on a 30 mile trip. All I do is drive back and forth to work, 30 miles each way, about 20 miles of that on interstate. I recently replaced the distributor, plugs and wires; gas filter; cleaned the IAC valve; new air filter; alternator. None of these things have solved the problem. Gas mileage remains steady at just over 24.3mpg consistently. It does not normally miss under load/acceleration. It has not stalled on me. I'm not using the cruise either.

One thing I know is bad is the EGR temp sensor -- according to the self-diagnostic. The check engine light has been on for awhile due to this problem. I can't imagine this would be the cause, but maybe it is.

Does anyone have any ideas?






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