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    Lack of Power when engine is warm

    I'm a new member and getting used to e30's, so please bare with me.

    Just recently purchased a 87' 325e, the car is stock except for the PO did a "hot air" intake, inwhich he just stuck on a giant cone filter directly to the MAF and also bypassed a breather hose and added a aftermarket cone breather. He also sawed off the stock muffler and welded in a glasspack.

    Now with that said, I am experiencing a weird hesitation during acceleration.
    The best way i can put it is a "row boat" feeling when you accelerate, and this greatly reduces the power the car has. The feeling is most pronounced at 1/2 throttle, and it feels like the car fights through it better at WOT.


    The kicker is that the car has no starting issues, and has good fuel economy. It runs especially pefect, with almost zero "row boat" feeling and considerably more power in the cold mornings and cold evenings than it does during the heat of the day.

    Can someone help me guide what i need to check to figure this problem out?

    I don't think its the ICV valve, i cleaned that out and there was no change.
    The engine temp sensor works intermittently, if at all (thinking it might be loose since it jumps especially when i hit a bump). When it does work it consistently shows a fault temperature for the motor. As in when the motor is at normal operating temperature it will show just below the first tick on the temp gauge.

    I keep hoping its not a combination of problems, i did take out the headlight assembly to see if its not just the intake, and although i did think it made a minimal difference in throttle response, the row-boat feeling was never diminished significantly.


    I'm at a loss!!

    help!

    #2
    With the other "creative mods" it wouldn't be surprising to find that the PO removed the thermostat, which will make the engine run cold and that will cause performance problems.

    The bouncing of the temp gage could be due to a bad connection at the gage, bad temp sensor, or a problem with the wiring, but a more common cause is a loose connection where the temp gage mounts to the main PCB in the cluster. Reflowing the solder on those pads is the fix. A search should turn up more info on this repair.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

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      #3
      i ripped the headlights out and drove around town for a bit, it seems after a more concrete test i think that majority, it not the entire problem, is in that damn hot air sucking intake.

      going to hopefully buy a stock air box asap.

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        #4
        i had the same problem, after i chipped it it went away.

        Comment


          #5
          he might of adjusted the AFM, or has an M30 afm, for me an untuned m30 AFM made the car hesitate at WOT from around 2000rpms then it would clear up and go.


          7speedshop.com

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            #6
            i am haveing same issues car feels really quick when its cold at first starts in the morning but once it get a lil warm it has a hesitation to it and its a huge difference its a big drag and it just started happening idk plz could someone give me some advice thnx

            Comment


              #7
              bump

              Comment


                #8
                The intaking sucking in hot air could be a problem at very low road speeds, but not at speeds above 45mph. Enough air is flowing through the engine bay then to keep the intake air temperatures reasonable.
                The car makes it possible, but the driver makes it happen.
                Jim Levie, Huntsville, AL

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