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jerky driving = check engine light 850 1996

posted by  Mary A on  Tue Oct 14 05:20 CST 2003
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I have a question about my 1996 850 GLT. It seems that once the gas tank gets to about half empty, it starts driving occasionally in a jerky motion, as though a gas line is clogged up or the like. The check engine light goes on following this jerkiness. The way I have managed to solve this problem is to fill up the gas tank and make sure the gas cap is on tightly. In a few days, the check engine light goes away or turns off. So, now I refill my car when it is half empty to avoid this jerking motion that sets off the check engine light. I have come to the conclusion that the problem may involve any one of the following: faulty gas cap sensor, clogged gas filter, clogged gas line, etc.. Any clues or opinions from others would be appreciated in helping me diagnosis this problem before I spend lots of money. Many thanks.







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    jerky driving = check engine light 850 1996

    posted by  someone claiming to be francisira on  Fri Oct 17 01:42 CST 2003 [RELATED]

    pull the code/s to give you an idea of where to look. it might be as simple as replacing your gas cap.








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    jerky driving = check engine light 850 1996

    posted by  Hamfisted on  Tue Oct 14 06:20 CST 2003
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    Might be a break in the fuelpump feed line inside the fueltank or just a fuelpump going bad. There's a short accordian type hose between the fuelpump and the fuel feed line inside the fueltank and it might be cracked. If the fuelpump is going bad usually the fuse there in the fusebox will be very warm to the touch. If you take the gas cap off and just turn the ignition key to the ON position (engine not running...) and listen in the gastank to see if the fuelpump sounds noisy. You can pickup a Actron 9135 OBDII code reader over on Ebay for about $100 and be able to read the codes that set off the Check Engine Light. Unless you want to do that I would suggest finding a good reputable independent repair shop that handles Volvos and let them checkout the fuelpump and maybe change the fuel-filter too. Good luck......


    Mike







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