m20b27 loss of enigne power....

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  • Xmedina
    Member
    • Feb 2012
    • 76

    #16
    Would 19lb ford injectors be ok? Cuz
    I only have 5 of the origional injectors, 1 was bad and got thrown away...

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    • Xmedina
      Member
      • Feb 2012
      • 76

      #17
      Ive checked over and over for leaks, whats a good way to check it tho? Ive just sprayed carb cleaner aroud the possible leaks to see if idle will jump and ive found nothing

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      • SLEEPYDUB
        Mod Crazy
        • Dec 2011
        • 658

        #18
        Im his roommate and I've been trying to help him fix it as well.

        Crucial parts he has changed:
        Spark plugs - From autolite to NGK
        Wires - Old ones came apart
        Cap - Old one was very worn, new one made no change
        Rotor - Same as above
        Coil - No change
        02 Sensor - No change
        Both Fuel pumps - Helped a little, but problem came back
        Fuel filter - Helped, but problem came back yet again
        DME - no change
        AFM - Every AFM he has tried has net a different outcome. Some ran better, some ran worse. The one on there now seems to work ok, but still hesitant, and the car back fires very loudly under heavy load

        TPS - Disconnecting the TPS currently does nothing when the car idles. He changed it out from another car, but we really dont know if it worked on the other car or not

        IACV - unplugging makes a big difference in idle, but it should have no effect on cruising and wot

        FPR - No change
        No vacuum leaks as far as we can tell. Did the starting fluid test, no luck.
        Injectors have been changed twice with no results

        He has also replaced the sensors associated with the cooling. Theres quite a few of them, but he replaced them with used junkyard parts so theres no telling if they worked or not. But, the only sensor that I can deem useful for replacing would be the CTS that sends a signal to the ecu.


        Originally posted by jlevie
        Those are the wrong injectors. Put the originals (or ones from a 9/87 or earlier ETA) back in.

        The problems that show up after the car has run for 5 minutes or so suggest that the cause is something that comes into play once the engine goes into closed loop operation or, this being an ETA, when the cold start system drops out. My first suspicion would be intake leaks.
        Exactly what I was thinking. Although, I have thought of a lot of things wrong, but this sounds the closest. However, wont the eta run in open loop once its at wot? His issues are at wot and cruising.
        - AXIS POWERS - 2JZ E30 Build
        Current Project - 87 325is 2JZ Swapped with M4 DCT

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        • mrgraphics
          Wrencher
          • Dec 2011
          • 221

          #19
          My 86 325es would start and run, then as it got warm would just quit. It wouldn't start until it cooled off. Turns out I had a bad crankshaft position sensor. It was in the process of failing, but would work well enough cold to start and run for a bit.

          There are 2 in an ETA located on the bell housing. They're both the same. I'd suggest trying to swap them first, as one is critical to the engine running.

          In my case, when I swapped them, the sensor gave up the ghost and completely failed . . . thus I knew I had the right part.

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          • SLEEPYDUB
            Mod Crazy
            • Dec 2011
            • 658

            #20
            Originally posted by mrgraphics
            My 86 325es would start and run, then as it got warm would just quit. It wouldn't start until it cooled off. Turns out I had a bad crankshaft position sensor. It was in the process of failing, but would work well enough cold to start and run for a bit.

            There are 2 in an ETA located on the bell housing. They're both the same. I'd suggest trying to swap them first, as one is critical to the engine running.

            In my case, when I swapped them, the sensor gave up the ghost and completely failed . . . thus I knew I had the right part.
            Good advice
            - AXIS POWERS - 2JZ E30 Build
            Current Project - 87 325is 2JZ Swapped with M4 DCT

            Comment

            • Xmedina
              Member
              • Feb 2012
              • 76

              #21
              Well thats def. one of the things i have not checked is there a way to test it before trying to change it? And is it the one with the black clip or the gret clip?

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              • Xmedina
                Member
                • Feb 2012
                • 76

                #22
                Well we changed both CPS and still nothing.

                Whats next guys? A lighter and a gallon of gas?

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                • Xmedina
                  Member
                  • Feb 2012
                  • 76

                  #23
                  Im so lost with this thing....some one plz help

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                  • TurboJake
                    No R3VLimiter
                    • Oct 2010
                    • 3780

                    #24
                    Did you replace the green box thats next to the ECU? It's the idle control module.


                    Leave Me Transaction Feedback

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                    • Xmedina
                      Member
                      • Feb 2012
                      • 76

                      #25
                      no i havent but how would that affect the way the ar drives if that controls idle? the car idles fine.....only cuts out under a load after 10 min of driving...

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                      • Xmedina
                        Member
                        • Feb 2012
                        • 76

                        #26
                        any one else care to take a stab at it?

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                        • andrewm
                          E30 Addict
                          • Apr 2010
                          • 456

                          #27
                          Try a leak down/compression test.
                          1987 Delphin 325e Sedan - Natalie
                          1990 325i 24v
                          1997 Chevrolet K1500 Crew Cab 4x4 - The Centurion

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                          • Xmedina
                            Member
                            • Feb 2012
                            • 76

                            #28
                            ive tested 2 and they both read 175, is that what normal m20b27's run?

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                            • Xmedina
                              Member
                              • Feb 2012
                              • 76

                              #29
                              bump for some help....

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                              • Xmedina
                                Member
                                • Feb 2012
                                • 76

                                #30
                                No one wants to help me?

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