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    325i Engine Stuttering

    Hi,
    specs; 89 325i, k&n, no cat, ansa sport, schatz and krum chip

    This problem started out only on warm-up, but today it's not going away.

    After starting up the car, around 3000rpm it would stutter and I would get kind of a pulsating emission from the exhaust.

    After driving it below 3000 rpm for 10 minutes or so that would stop and the car would be great.

    Today that happened but it didn't stop. I replaced the chip with the stock chip but it didn't go away.

    If I'm gentle on the gas it will kind of not happen, but with any type of acceleration beyond 20% it happens.

    What's going on here? plugs? injectors? chip? filter?

    #2
    check these descending order.
    1.) intake for vacuum leaks
    2.) plugs
    3.) plug wires
    4.) Distro cap & rotor
    5.) physical ECU (unlikely)
    6.) Injectors
    1991 E30 M3 Brilliant/black - S54B32/5M
    1990 E30 318iT RHD Lagunagrun/tan - S52B32Turbo/5M
    2011 E82 1M VO/blk/6M
    1991 E31 850i red/grey/6M
    1997 F355 spider red/tan/6M

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      #3
      Well, just for shits and giggles, check the connector that plugs into your AFM. Friend of mine had a similar, though not the same, problem and it ended up that one of the connections on the afm was all bent out of shape.

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        #4
        Sounds like electrical timing. Check the wires and plugs.
        -tim
        Originally posted by Jordan
        I like the stance
        -Coining hip terms since 10/9/03

        Comment


          #5
          IF I have to replace the plugs or wires, what's the recommended wires and plugs for an upgrade from stock?
          Last edited by QWKE30; 03-15-2010, 01:25 PM.

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