Working out some kinks UPDATE (Bogging, jerking, hesitating at low ks)

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  • Jib05
    Advanced Member
    • Aug 2012
    • 149

    #31
    Ive installed and wired a brand new transfer pump over the weekend, and still no change. I must be missing something.
    .................................................. ...................sigpic
    .................................................. ............................. ......M50B25 3.1L stroker

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    • Jib05
      Advanced Member
      • Aug 2012
      • 149

      #32
      So on m50s the crank pos sensor controls the ignition timing and the cam pos sensor controls the fuel injector timing? mine measure within tolerance but maybe i should try getting brand new ones?
      .................................................. ...................sigpic
      .................................................. ............................. ......M50B25 3.1L stroker

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      • pandaboo911
        R3VLimited
        • May 2010
        • 2070

        #33
        Again. Check fuel pressure before throwing money at it

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        • Jib05
          Advanced Member
          • Aug 2012
          • 149

          #34
          well blew the headgasket today, don't know how or why... GGWP. Game over.


          EDIT

          Apparently condensation? thats what a mechanic said. After checking fuel pressure ill be giving it to a mechanic to sort out as i think i've exhausted my knowledge/abilities.
          Last edited by Jib05; 06-10-2015, 01:47 AM.
          .................................................. ...................sigpic
          .................................................. ............................. ......M50B25 3.1L stroker

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          • Jib05
            Advanced Member
            • Aug 2012
            • 149

            #35
            Just to update this thread, the issues were

            1) Crack in insulation in coil pack #4. just happened to start my car one night for no apparent reason and saw the spark jumping from the coil to the rocker cover.

            2) Ecu/tune. Either the ecu or chip tune in my original ecu was kaka. Bought another NV ecu.

            3) Vacuum leak at the PCV valve. Although I smoke tested 3-4 times, it wasn't enough to show this leak. The O-ring was brand new but i must've done something weird to cause it to not seat properly.

            Complementary to this I did install a fuel pressure gauge. The fuel pressure did come up fine, but i feel for the price and ease of installation its worth having that extra thing to help me with this car.

            Again thanks to pandaboo911 for your help! Also R3v! Churr.
            .................................................. ...................sigpic
            .................................................. ............................. ......M50B25 3.1L stroker

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