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Thread: M50 misfire at full throttle

  1. #1
    Join Date
    Jun 2019
    Location
    Petaluma CA
    Posts
    24
    My Cars
    2001 BMW 330ci

    M50 misfire at full throttle

    I have an m50tu that's bone stock, just did a head gasket and intake manifold refresh on. So far it drives fine when you're cruising but as soon as you go full throttle, it starts to misfire consistently. After I cause it to misfire , it will then occasionally miss when driving normally.

    I tried running it with the MAF unplugged to see what would happen, and found out that shortly after starting to drive, it started to misfire all the time.

    Any thoughts and recommendations are welcome.

    Sent from my CPH2451 using Tapatalk

  2. #2
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,079
    My Cars
    1997 328i
    Was the head decked and checked for cracks?
    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".

  3. #3
    Join Date
    Jun 2019
    Location
    Petaluma CA
    Posts
    24
    My Cars
    2001 BMW 330ci
    Quote Originally Posted by Eric93se View Post
    Was the head decked and checked for cracks?
    Yes the head was decked and inspected. Block was prepped as well

    Sent from my CPH2451 using Tapatalk

  4. #4
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,079
    My Cars
    1997 328i
    Check all your electrical connections and the grounds for the coils.
    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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