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1994 850 10-valve idle and hesitation problem 850

posted by  volvorecycle on  Mon Sep 24 09:54 CST 2007
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last visit: Mon Apr 7 09:43 CST 2014
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On this volvo it sometimes idles very good and acelerates very well, other times it idles rough(up and down) and has poor aceleration(hesitates)It can run good for whole trip, then bad the next trip. It can run good at one stop sign and bad the next one. It is a very irratic problem.
Also a note, the o2 sensor reads a constant 900 mv at idle and 2500rpm. When I snap back the throtle ( release gas pedal) the voltage go to about 300mv then go back up to 900mv. That tells me that the o2 sensor is working and the car must be running rich, which still doesnt explain the irratic running problem.

This car does have high milage 350,000k and i would suspect intake gasket, but i used accetyline and could determine a intake leak anywhere.

And tips or suggestions would be apprciated, thank-you

Volvorecycle






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New 1994 850 10-valve idle and hesitation problem [850]
posted by  volvorecycle  on Mon Sep 24 09:54 CST 2007 >


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