Another cranking but no start thread

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  • Marshmellow
    Noobie
    • Nov 2015
    • 33

    #1

    Another cranking but no start thread

    Hello all, I'm newbie 'round these parts, but I definitely need some help with my 325i. Basically what happened is one morning I went to start my car and as I cranked it, it wouldn't turn over. I thought maybe my spark plugs were due for replacement so I went ahead and put some Bosch w8clr's and it started no problem. This week same thing happened again but it was worse. I need some help in figuring out why this is doing this. I've attached a video so hopefully someone can help me out!

  • modernist
    Wrencher
    • Apr 2014
    • 283

    #2
    boop

    was that a backfire?

    1986 327i
    transaction feedback
    DIY thing
    meh

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    • Marshmellow
      Noobie
      • Nov 2015
      • 33

      #3
      Yes and thats the strange thing i have no idea why its backfiring also another reason why ive made this thread was because i havent seen any others with a backfiring issue

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      • Marshmellow
        Noobie
        • Nov 2015
        • 33

        #4
        bump somebooooooodeeee help me figure out why im backfiring!

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        • turbo55
          Wrencher
          • Jul 2014
          • 223

          #5
          Maybe your timing could be off? If your belt jumped a tooth... How was it running before you turned it off?

          Also maybe a ceank positon sensor? CPS? Theres a procedure for testing it i think

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          • Marshmellow
            Noobie
            • Nov 2015
            • 33

            #6
            Once i get it started it usually runs great with no problem. It does this periodically to me where one day i can turn the key and it'll start in 2-3 seconds no backfire and its good for the rest of the day but on other days it will backfire and refuse to start. Pulled sparkplugs and soaked with fuel, oil also smelled like fuel after a few attempts at starting. Ruled out CPS as i have no check engine light

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