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random stall. what do you think? 850 1996

My 850 just randomly quit yesterday. All I did was punch the gas for a couple of seconds and then she just died. The only way I could start her back up was to spray throttle body cleaner in the intake. She would run for a couple of minutes or miles and then shut down again. I had to wait for 10-15 minutes before she would start again. In between running, the engine spun fine - just would not ignite. Today she ran fine.

I checked the plugs. They look ok - a litlle carbon but not much. Cap and rotor are fairly new. Fuel and air filter are recent as well. The fuel pressure is about 42 psi - that should be ok. No vacuum leaks. Any ideas?

The only other problems I have is that sometimes I have to press the shiftlock to get out of park. Could that affect the running too? Also mileage may have decreased recently.

Thanks for the help.








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    random stall. what do you think? 850 1996

    How many miles do you have on the car?

    A little carbon? I just pulled the plugs out of my 1988 740 because it was hesitating occasionally. This car has 228,000 miles on it and the inside insulators and electrodes only had a little beige silicon on them. At my next service, my tech adjusted the idle as it was a little low, problem solved.

    The only carbon on your plugs that might be found in a healthy engine is a slight amount on the bottom of the threaded metal shell of the plug. You might have flushed a little carbon from the throttle body into the engine. You could prove that by looking at one of the plugs again, if it is clean, that is what probably happened.

    Do you have any codes displayed?

    A few years ago I had an engine dieing while accelerating or coasting gently. It turned out to be a sensor in the distributor. My dealer put the car out in his yard and hooked it up to a machine. They told me that it ran for 4 or 5 hours but eventually died, and they were able to diagnose and repair the problem.

    If your car dies again, I'd have it towed to the dealer, otherwise, you or they may have a hard time finding the problem.
    --
    2 8s & 2 7s 700,000 miles total








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      random stall. what do you think? 850 1996

      I have a stall problem (see my other post in the [all] thread) with my ´95 460 2.0i too. Perhaps towing it away is not such a good idea, since mine does restart after some time. I hope to find out more at my local garage this weekend, but any suggestions are still very welcome!







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