M42 won't start?

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  • 1991 e30 bmw 318is
    E30 Addict
    • Jul 2007
    • 523

    #1

    M42 won't start?

    well my car sat in my garage on blocks all winter and i just did some work to it like shocks struts and stereo and stuff, nothing to affect the motor. but i did take off the valve cover and mani, and painted them, put it back on and changed the oil with 20-50 and changed the coolant. had been charging the batt on and off all winter so i know thats ok. so it turns over fine, and when i turn on the key there is a click click click from something under the hood, i think this is normal. i smell gas after awhile, and it did kinda make a little back fire once(think i flooded it) and i can hear it almost start a few times but it just wont. left it for a day with the charger on it, still wont fire. i am going over all the stuff i was taking on and off and its all good, except i did not check the plugs they might be the problem i hope so. any one have any ideas? O one more question when i put the key on should i hear the fuel pump kick in for a sec? i don't remember if it did before or not.
    91 e30 318is M50 SOLD
    http://www.r3vlimited.com/board/showthread.php?t=149570
    92 325 vert project
    http://www.r3vlimited.com/board/showthread.php?t=341370
  • 1991 e30 bmw 318is
    E30 Addict
    • Jul 2007
    • 523

    #2
    i found out the fuel pump is not working, then did this....
    I was just reading my bmw 3 series service manual, and it showed how to test the relay and it was all ok tell i tested for a ground its not getting a ground. from what i then read in the book it goes back to the ECM not letting it get a ground so not letting it give power to the fuel pump. a pics of what i did...... unless i tested the wrong relay.

    91 e30 318is M50 SOLD
    http://www.r3vlimited.com/board/showthread.php?t=149570
    92 325 vert project
    http://www.r3vlimited.com/board/showthread.php?t=341370

    Comment

    • kencopperwheat
      King of Kegstands
      • Oct 2003
      • 14396

      #3
      Fuel pump doesnt prime in the 91 318is.
      Originally posted by Gruelius
      and i do not know what bugg brakes are.

      Comment

      • 1991 e30 bmw 318is
        E30 Addict
        • Jul 2007
        • 523

        #4
        ok then you think fuel is not the problem to this not starting?
        91 e30 318is M50 SOLD
        http://www.r3vlimited.com/board/showthread.php?t=149570
        92 325 vert project
        http://www.r3vlimited.com/board/showthread.php?t=341370

        Comment

        • jrobie79
          R3VLimited
          • Mar 2006
          • 2521

          #5
          are you getting spark? my car wouldnt start, and it ended up being the crank posistion sensor, i checked the resistance and it was way different than what it should be (my sisters m42 was working fine and i checked mine against hers, the resistance that is, and my CPS was bad, swapped a new one in and fired right up.
          1991 318is --- currently not road worthy
          1991 318i ---- 308K - retired

          Originally posted by RickSloan
          so if you didnt get it like that did you glue fuzzy oil to the entire thing?

          Comment

          • 1991 e30 bmw 318is
            E30 Addict
            • Jul 2007
            • 523

            #6
            i disconected the batt for over 15min today thought it might clear the computer or something, and it did because it works now i also had the batter charger on it. but i think i'm going to do the timing chain so allot of it will be apart again.
            91 e30 318is M50 SOLD
            http://www.r3vlimited.com/board/showthread.php?t=149570
            92 325 vert project
            http://www.r3vlimited.com/board/showthread.php?t=341370

            Comment

            • aka-e30
              Noobie
              • Jul 2011
              • 15

              #7
              jrobie79 can you tell me what the resistance is supposed to be on the CPS please? I need to test mine, thanks!

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