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Thread: Loss of power, running rich, jumping and backfiring.

  1. #1
    Join Date
    Jul 2018
    Location
    Beaverton, Oregon
    Posts
    46
    My Cars
    1979 320i

    Loss of power, running rich, jumping and backfiring.

    I've recently got my E21 running and she's been running like a dream for the last three weeks. I ran her down to the local coffee shop to scoop some free wifi and people watch. The ride there was great nothing out of the ordinary.

    Fast forward to my departure and she turned over fine as I went to leave I noticed that she was struggling in first great the car seemed as of it wanted to die, then giving it gas almost 60% the car starts to jolt and bounce like it trying to gain power and stutters as it tries to gain rpms.

    I put the car in N and Rev the motor and it struggles to pass 2500rpm then clean all the way up to about 7k no problem.

    My assumption would be something to do with fuel/air mixture as the car smelt heavy of raw fuel and it seemed like it oukdnt decide if it wanted to go or die.

    It was just odd it literally just happened out of the blue. No warnings she just decided to have a period.

    Any help is appreciated.

    Sent from my SM-G955U using Tapatalk

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    Sounds like a soft failing fuel pump. Is it original? When was the fuel filter changed? Ditto for the fuel pressure regulator?

  3. #3
    Join Date
    Jul 2018
    Location
    Beaverton, Oregon
    Posts
    46
    My Cars
    1979 320i
    Quote Originally Posted by MarcoZandrini View Post
    Sounds like a soft failing fuel pump. Is it original? When was the fuel filter changed? Ditto for the fuel pressure regulator?
    I'll start here. Thanks for giving me somewhere to start.

    Sent from my SM-G955U using Tapatalk

  4. #4
    Join Date
    Jul 2018
    Location
    Beaverton, Oregon
    Posts
    46
    My Cars
    1979 320i
    Quote Originally Posted by MarcoZandrini View Post
    Sounds like a soft failing fuel pump. Is it original? When was the fuel filter changed? Ditto for the fuel pressure regulator?
    I do believe it is likely to be the fuel pump that came with the car. Seems to old to be new. Same could be said about the regulator.

    I've only changed out the plugs, wires, distributor cap, breaks and rotors since I've owned the car. 211 9n the ODO that doesn't even work anymore. So who knows.

    Sent from my SM-G955U using Tapatalk

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