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Thread: 1992 318i vert rough cold running

  1. #1
    Join Date
    Sep 2012
    Location
    Dania Beach, FL
    Posts
    77
    My Cars
    1992 BMW 318iC E30

    1992 318i vert rough cold running

    Hey guys, my convertible is finally running and driving after extensive repairs. However, it misfires badly under load until engine is close to operating temperature, after that it runs great but idles high (1000rpm). It sat in my driveway for a year then I did everything. She got a new gas tank and fuel pump and fuel filter and new plugs. New cam and crank sensors. Unrelated items include suspension overhaul, brake master cylinder, clutch slave cylinder, alternator and battery.

    Thanks for any advice! It's a little annoying to wait 15 to 20 minutes before I can drive it!

  2. #2
    Join Date
    Jan 2010
    Location
    Estacada Oregon
    Posts
    387
    My Cars
    E30M3 X2 R100GS/PD R60/5
    Have it smoke checked for vacuum leaks

    Sent from my SM-G360V using Tapatalk
    Angus
    88 E30M3 X2 (1 summer/1 racetrack)
    89 325IX (winter)
    92 R100GS/PD

  3. #3
    Join Date
    Sep 2012
    Location
    Dania Beach, FL
    Posts
    77
    My Cars
    1992 BMW 318iC E30
    Did find a vacuum leak but it still ran poorly. I decided to replace the TPS, ICV, and FPR. While doing so I found that the return fuel line was dry and the FPR was pretty well stuck in the rail. After replacing everything (all those items are more easily done by removing the intake manifold so I did them all at once) it ran great!


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  4. #4
    Join Date
    Sep 2012
    Location
    Dania Beach, FL
    Posts
    77
    My Cars
    1992 BMW 318iC E30
    Quote Originally Posted by Bimmerfan84 View Post
    Did find a vacuum leak but it still ran poorly. I decided to replace the TPS, ICV, and FPR. While doing so I found that the return fuel line was dry and the FPR was pretty well stuck in the rail. After replacing everything (all those items are more easily done by removing the intake manifold so I did them all at once) it ran great!


    Sent from my iPhone using Tapatalk
    UPDATE: Car was still backfiring while cold. My problem was a new aftermarket crank sensor (Prenco) I installed. Put a BMW one in and it runs perfect.


    Sent from my iPhone using Tapatalk

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