Hessitation past 4K RPM.. Help..

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  • BMWLOCO
    Advanced Member
    • Oct 2003
    • 129
    #16
    Originally posted by dnguyen1963
    Pull the plugs when your car dies...I bet they are completely wet because of the 19# injectors.
    This started BEFORE I put in the Mustang Injectors. I'll pull them to see if that's an issue regardless.

    Thx..
    - Y2K M Coupe (DD, Track Rat)
    - '08 Land Cruiser (Family Hauler/Tow)
    - '90 E30 4/5sp. (DD/ Son)
    - '87 AW11 Mr2 (AutoX-Rally-Track)
    - '06 Royal Enfield Bullet 350 w/sidecar (weekend cruiser)

    Future
    - E92 M3
    - 88-91 M3 (maybe.. if I can find one, regret selling in 05)

    - Richie

      Comment

      • BMWLOCO
        Advanced Member
        • Oct 2003
        • 129
        #17
        Originally posted by I got it, yes!!
        did you try changing the main relay? just a thought, but i had one go bad intermitantly and it had the same effects your describing.
        I replaced the main relay with another one laying around that I pulled form a junkyard a month ago. It ran good for a few days, and went out again. I'll swap the old one back in to check.

        Thx..
        - Y2K M Coupe (DD, Track Rat)
        - '08 Land Cruiser (Family Hauler/Tow)
        - '90 E30 4/5sp. (DD/ Son)
        - '87 AW11 Mr2 (AutoX-Rally-Track)
        - '06 Royal Enfield Bullet 350 w/sidecar (weekend cruiser)

        Future
        - E92 M3
        - 88-91 M3 (maybe.. if I can find one, regret selling in 05)

        - Richie

          Comment

          • maximapitko
            Noobie
            • Sep 2008
            • 3
            #18
            Sputtering at high rpm and it dies? A possibility would be a clogged exhaust. Remove the o2 sensor and take it for a spin. Let me know...

              Comment

              • jlevie
                R3V OG
                • Nov 2006
                • 13530
                #19
                Originally posted by maximapitko
                Sputtering at high rpm and it dies? A possibility would be a clogged exhaust. Remove the o2 sensor and take it for a spin. Let me know...
                A better test is to temporarily replace the O2 sensor with a pressure gauge. Anything over 1.5-2psi back pressure is bad.
                The car makes it possible, but the driver makes it happen.
                Jim Levie, Huntsville, AL

                  Comment

                  • IRON-E
                    I waste 90% of my day here and all I got was this stupid title
                    • Dec 2007
                    • 16548
                    #20
                    Maybe I'm just reaching but how about the AFM? It could be clogged too. Check for busted fuel lines, and vacuum leaks.
                    @IRON-E30 aka Edwin:D

                      Comment

                      • jlevie
                        R3V OG
                        • Nov 2006
                        • 13530
                        #21
                        What you need to do is to see what the rail pressure is when the engine is misbehaving. Tee a pressure gauge into the rail feed line and zip tie the gauge to the driver's windshield wiper.
                        The car makes it possible, but the driver makes it happen.
                        Jim Levie, Huntsville, AL

                          Comment

                          • BMWLOCO
                            Advanced Member
                            • Oct 2003
                            • 129
                            #22
                            Thanks to all..

                            So far, after the new single stem plugs, the car is running better. I ordered a new FPR and put that in this AM and went for a long drive. A few WOT pulls, and etc..

                            The car is running good. No hesitation, and no sputtering. I think I'm good..

                            More updates as needed.. Thanks again!
                            - Y2K M Coupe (DD, Track Rat)
                            - '08 Land Cruiser (Family Hauler/Tow)
                            - '90 E30 4/5sp. (DD/ Son)
                            - '87 AW11 Mr2 (AutoX-Rally-Track)
                            - '06 Royal Enfield Bullet 350 w/sidecar (weekend cruiser)

                            Future
                            - E92 M3
                            - 88-91 M3 (maybe.. if I can find one, regret selling in 05)

                            - Richie

                              Comment

                              • E30_fiend
                                R3V OG
                                • Apr 2006
                                • 7348
                                #23
                                After reading the thread I was going to ask which plugs you used but then you answered the question.

                                Those two, three and four prong plugs are a joke. No good for any car. Just a marketing scam. People automatically think,"more prongs equals more spark which equals MOAR POWA!" But in reality, electricity finds the closest route to ground. It will choose its path down one prong and keep using it. Rendering the other prongs useless.

                                Glad you figured it out though.


                                Taylor
                                Need a performance chip for you BMW? Shoot me a PM and I'll get you taken care of!!
                                Taylor- Follow me on Instagram @e30_fiend

                                  Comment

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