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    #1

    m52 won't start

    Just finished the timing on my m52 and it cranks but won't fire up. I've tried putting 12v to the fuel pump to make sure its getting fuel but it won't kick over. But when I disengage the pump it will fire up and clear what's in the cylinders.

    Do I have bad gas? Or dumping too much fuel into the motor? Or can my o2 sensor be bad? I'm not sure if that reads when cranking. Thanks for any help
    If you're not going to do it right, please don't take it out on your car!
    Tags: None
    #2
    Anybody have any ideas? I reset the ecu to see if that would change anything and it didn't
    If you're not going to do it right, please don't take it out on your car!

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      #3
      Maybe your relays are bad?..

      Comment

        #4
        Check for spark
        91 318is...DD:finger:/85 325es SOLD/91 318is RIP


        Originally posted by naplesE30
        Must stop clicking on Norwegian threads. Makes me wanna punch my car in da mouf.
        Originally posted by einstein57
        My tranny sounds like a blender full of walnuts. So I added sound deadner to the tunnel and put in a louder stereo. Am I doing it right?
        Castro Motorsport/E30 specialist
        North Hollywood, Ca. 818 310-2497

        Comment

          #5
          Check crank position sensor
          91 318is...DD:finger:/85 325es SOLD/91 318is RIP


          Originally posted by naplesE30
          Must stop clicking on Norwegian threads. Makes me wanna punch my car in da mouf.
          Originally posted by einstein57
          My tranny sounds like a blender full of walnuts. So I added sound deadner to the tunnel and put in a louder stereo. Am I doing it right?
          Castro Motorsport/E30 specialist
          North Hollywood, Ca. 818 310-2497

          Comment

            #6
            I checked for spark and cylinder 1 wasn't getting any spark. After many upon many cranks She finally fired up. Running really rough but all of my relays worked fine. After letting it run for a bit cylinder 1 was getting spark. I'm going to run a bunch of cleaner through the system and put fresh fuel in to see if it clears up. Would it run at all with a bad crank sensor?
            If you're not going to do it right, please don't take it out on your car!

            Comment

              #7
              Do you have a fuel pressure regulator? After 95 they went to remote under drivers side setup. If you have a multimeter you could check your cps for ohms a wise choice if you ask me it's 50-100 bucks

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