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Possible Variable TPS issue in Megasquirt

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    Possible Variable TPS issue in Megasquirt

    I have an E36 throttle position sensor wired into my E30 wiring harness. At closed throttle, Megasquirt reads 0%, and at wide open, it reads 100%.
    The problem is that when I hit the gas pedal, it doesn't go through the whole range to get there. It might read no change, then all of a sudden 30%, then no change until 70%, then no change until 100%. However, when I let off the pedal, it reads pretty much every percent until it goes back to 0%.
    Is this an issue?
    1969 Chevrolet El Camino - SOLD
    1979 BMW 320i - Traded
    1980 BMW 633CSi - SOLD
    1986 Chevrolet K30 Silverado - SOLD
    1987 BMW 325es - Totaled
    1987 BMW 325ic - Traded
    1990 BMW 325is - First car/Sunday Cruiser
    2004 BMW 325xi - Totaled
    2007 BMW 335i vert - Traded
    2018 Chevrolet Cruze - Totaled
    2019 Subaru Impreza
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1980 Suzuki GS850 - SOLD
    2004 Harley Davidson Softail - Traded
    2007 Suzuki GZ250 - SOLD
    https://www.flickr.com/photos/155574105@N08/albums

    #2
    It will be hard to setup accel enrichment and other tables based on TPS. I would investigate further if you are interesting in having a TPS for these types of functions. If you simply want flood clear to function, don't worry about it.

    I don't know much about E36 TPSs, but I would confirm with a multimeter that you have the right pins wired to megasquirt
    '84 318i M10B18 | 93whp/90ftlbs | 147- Safari Beige | MS2E w/ LC, 2-Step

    Comment


      #3
      is the sensor new?
      89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

      new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

      Comment


        #4
        Originally posted by digger View Post
        is the sensor new?


        I would guess the potentiometer in it is broken. Grab another sensor? It should move smoothly.


        Sent from my iPhone using Tapatalk

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          #5
          Mine did this when it took a shit. Get a new TPS. Car would always die at a stop as well.

          1991 325iS turbo

          Comment


            #6
            Ended up getting it tuned with no problem. Sensor was new/OEM from the dealer, and just in case I had it replaced with another new OEM one.

            Tuned using alpha-N due to ITBs.
            1969 Chevrolet El Camino - SOLD
            1979 BMW 320i - Traded
            1980 BMW 633CSi - SOLD
            1986 Chevrolet K30 Silverado - SOLD
            1987 BMW 325es - Totaled
            1987 BMW 325ic - Traded
            1990 BMW 325is - First car/Sunday Cruiser
            2004 BMW 325xi - Totaled
            2007 BMW 335i vert - Traded
            2018 Chevrolet Cruze - Totaled
            2019 Subaru Impreza
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            1980 Suzuki GS850 - SOLD
            2004 Harley Davidson Softail - Traded
            2007 Suzuki GZ250 - SOLD
            https://www.flickr.com/photos/155574105@N08/albums

            Comment

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