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1986 325es running issue

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    1986 325es running issue

    It has been hellaciously hot here lately and the other day a guy I sold my old car to said he was having trouble with the car. He described it as starting and running fine but after about a half mile the car would suddenly just stop running. When the motor would quit he said the tach would go all the way to 5k but the motor would not be that high of an rpm and then quit. The car would always restart again and idle just fine.

    He brought it over to me to see if I could figure out what was wrong and the car ran just great for me. I can not get it to act up again. I thought maybe the car was running on just the low pressure fuel pump and was running out of gas, but both pumps are working.

    I also thought that maybe with the car sitting in the hot sun that the ECU may have gotten a bit warm and was the problem. Has anyone ever had an ECU go bad when really hot and then be fine the next day?

    I also thought that maybe it was so hot that the fuel was vaporizing before it got to the injectors and that was why it was only able to go so far before the car ran out of fuel.

    Any thoughts on the subject would be much appreciated. Thanks!
    The difference between porcupines and BMWs is that porcupines have the pricks on the outside!

    #2
    The tach going higher than engine speed as the engine dies sounds like a timing sensor or DME problem. I'd start with new timing sensors.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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      #3
      CPS - my 86 es did the same exact thing.

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