FIXED! Fuel+spark= No start??

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  • ykarabala
    Member
    • Oct 2014
    • 90

    #16
    Sorry I'm getting back after a while. So I removed the fuel rail and while I cranked, gas was spraying so injectors are firing. Any ideas??

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    • M3PO
      E30 Addict
      • May 2012
      • 537

      #17
      Originally posted by ykarabala
      Sorry I'm getting back after a while. So I removed the fuel rail and while I cranked, gas was spraying so injectors are firing. Any ideas??
      Try a known good ECU or an unmolested 413 Red label. In these situations where everything seems good, it is the DME a lot of the time.

      If you have fuel spraying, spark, cranking, and a good crank sensor (OEM, not cheap China shit), it should at least try to start.

      How are you sure you have spark?

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      • ykarabala
        Member
        • Oct 2014
        • 90

        #18
        Will try a working ecu tonight. I grounded the spark plug and when the car cranks, a spark can be seen.

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        • ykarabala
          Member
          • Oct 2014
          • 90

          #19
          https://youtu.be/B-0CcVjFCTg">https://youtu.be/B-0CcVjFCTg" type="application/x-shockwave-flash" width="425" height="350">

          This is what the car sounds like btw. Swapped in a known working untouched red label 413 and still no luck.

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          • M3PO
            E30 Addict
            • May 2012
            • 537

            #20
            Your video isn't working for me.

            Just because you can see a spark does not mean that it will run. I had this happen with my M20. I could see the spark but it wasn't strong enough to fire. Condition of your plugs? Coil boots good? Have access to another set of coils?

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            • ykarabala
              Member
              • Oct 2014
              • 90

              #21


              Plugs are new. Boots are good. Try this video.

              After some deep thinking in the shower, I thought to myself and wondered if I had enough compression? Turns out the cylinders are all like 20 psi :( Gonna pull valve cover off to check timing and report my findings.
              Last edited by ykarabala; 04-21-2017, 10:51 PM.

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              • ykarabala
                Member
                • Oct 2014
                • 90

                #22
                Timing was off and I have no clue how that happened since I set it the proper way when building the motor. Will work on it soon and get back to you guys.

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                • ykarabala
                  Member
                  • Oct 2014
                  • 90

                  #23
                  Just wanted to update you guys and let you know that the sprocket was off and so was the exhaust cam. After setting it properly, car fired up good and strong!

                  Thank you all!!!

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                  • Slay89
                    Noobie
                    • Feb 2017
                    • 15

                    #24
                    yay gj

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