Poor running 325i

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Greg Mierz
    Member
    • Sep 2009
    • 51
    #1

    Poor running 325i

    Ok , I need some help here. I recently solved a intermittent start for a customer that turned out to be a sloppy connector at the fuel pump.
    While with me I replaced the blue two terminal coolant sensor that had a bad connector on it with a used one I had laying around. Car ran fine, sent him away happy. Now three days later, car will start ok, but runs poorly when given any throttle. Disconnect the AFM and it runs better. Swapped a known good AFM in and no improvement. Car will pop and sputter and back fire with connected AFM and no pops or backfire disconnected. Has anyone seen this behaviour before? Other than the swapped temp sensor and cleaning the injectors at c191(?) the round plug under the throttle body, I didn't change much to solve the no start. Bad used temp sensor?, Any ideas would be helpful. Thanks
    Last edited by Greg Mierz; 12-11-2014, 04:23 PM.
    Greg Mierz
    Puget Sound BMW club member since 1978
    Board Member for over 26 years now retired
    1969 2002 ti since 1974
    1986 325is my current daily driver
    GMTechnic BMW consultation service BMW mechanical services at less than independent shops or dealer
    Tags: None
    • e30josh
      Mod Crazy
      • Sep 2004
      • 718
      #2
      Does the car have an aftermarket intake?

        Comment

        • Greg Mierz
          Member
          • Sep 2009
          • 51
          #3
          No , bone stock, leaning strongly toward the Coolant temp sensor at the moment, replacing this morning.
          Greg Mierz
          Puget Sound BMW club member since 1978
          Board Member for over 26 years now retired
          1969 2002 ti since 1974
          1986 325is my current daily driver
          GMTechnic BMW consultation service BMW mechanical services at less than independent shops or dealer

            Comment

            • e30josh
              Mod Crazy
              • Sep 2004
              • 718
              #4
              Having the same problem with a friends car..let me know how it turns out. I'll be testing everything today

                Comment

                • Greg Mierz
                  Member
                  • Sep 2009
                  • 51
                  #5
                  Turned out to be the cap and rotor of all things.Put my timing light on it and went from plug wire to plug wire and got a few missing signals on a few cylinders. New cap and rotor solved it. Patrick Oneill and I both thought it was a fuel issue. Glad to have it solved and give the car back to the owner.
                  Greg Mierz
                  Puget Sound BMW club member since 1978
                  Board Member for over 26 years now retired
                  1969 2002 ti since 1974
                  1986 325is my current daily driver
                  GMTechnic BMW consultation service BMW mechanical services at less than independent shops or dealer

                    Comment

                    • e30josh
                      Mod Crazy
                      • Sep 2004
                      • 718
                      #6
                      Lucky you, the car I was working on had a handful of surprises. The owner left the hood off over night, rained all night...also had an oreily cap, rotor and cps with some non gapped autolites.

                      Cap was cracked down the middle, rotor was chipping apart and the cps was pulling 900 ohms. Not sure how it even ran, still runs like poo. Checking things off the list lol

                        Comment

                        Previous template Next
                        Working...