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Thread: Car Jumpy at 1.5k - 2.5 rpm

  1. #1
    Join Date
    Jul 2014
    Location
    Bay Area
    Posts
    30
    My Cars
    1995 BMW M3 Coupe

    Car Jumpy at 1.5k - 2.5 rpm

    Hello Everyone,

    So I was trouble shooting a misfire that showed up after a car wash. My car shut down and wouldn't turn on for a day, I believed it was my DME unit so I replaced it. Car turned back on but would make popping sounds and would generally idle abnormally, This was especially bad when I drove it. The engine sounded really bad when accelerating.

    I decided to do a tune up changing spark plugs, coil boots, fuel filter, fuel injectors and a couple breather hoses. I would do one maintenance item then try running it to see if there was improvements.

    The car sounds much better now but there is still this slight loss of power, sort of a jerky feeling, when I'm accelerating from around 1.5k to 2.5k rpm. The jerking feeling doesn't last throughout this range but at specific points and only when I'm pressing the gas. I don't know what can be wrong, I'm guessing fuel pressure regulator? or a bad fuse? Either that or a compression issue.

    Just looking for ideas on what direction to head now... I hope it's sufficient to pass her up coming smog test

  2. #2
    Join Date
    Jan 2019
    Location
    Connecticut
    Posts
    358
    My Cars
    E92, E46, E36
    I had a VERY similar situation with my e46 a few years back, turned out to be the mass air flow meter. Maybe not your issue but something to consider

    Sent from my SM-G960U using Tapatalk

  3. #3
    Join Date
    Jul 2014
    Location
    Bay Area
    Posts
    30
    My Cars
    1995 BMW M3 Coupe
    Quote Originally Posted by Ctwide3project View Post
    I had a VERY similar situation with my e46 a few years back, turned out to be the mass air flow meter. Maybe not your issue but something to consider

    Sent from my SM-G960U using Tapatalk
    I've heard of this being an issue. I'll try cleaning it out and if it gets worse I'll try replacing it. Thanks for your input

  4. #4
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,079
    My Cars
    1997 328i
    Possibly a vacuum leak.
    Attn. NEWBIES: Use the search feature, 98% has already been discussed.
    Click the search button, select "search single content type", select the "e36 sub forum" specifically, try the "search titles" then try the "search entire posts".

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