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M20 issues, diagnosing

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    M20 issues, diagnosing

    Pre problem:
    My water pump blew out on me, so I took it as an advantage do several jobs. I removed the intake manifold to change seals on my bitch tube, and also went ahead and painted the intake manifold and thermostat housing, while doing their respected gaskets. While doing the water pump I also did the camshaft seal and Oring.

    Now that you know what I've done to the car last week, here's the story. The car has been running well, in normal operating temperature the last several days I have driven it. Today I went on a drive with the lady and turned on the AC, it's 102 degrees here, and the car immediately started to crawl past half way on the water temp gauge. I turned the compressor off before the car could reach the third mark on the gauge. As the temperature reached back down to half way the motor seemed to have a small power loss and on deceleration the car popped like anti lag. When I would come to a red light I had to keep the rpm up for the motor to not stall. Now that the car is in the garage I can get it to fire but not stay running. Any clues?!

    Edit: after the car has cooled down, I went out to give it a start and the first try yielded in a start, but no idle and died. The second crank I gave it a bit of throttle and it fired up and idled after holding the rpm at 2000 for several seconds.

    Zack Eberl-Coe
    Last edited by Zreberlcoe; 06-29-2015, 03:34 PM.
    1991 325i Calypso Coupe

    Like Grandfather, Like Father, Like Son
    BMW


    #2
    Anyone?
    1991 325i Calypso Coupe

    Like Grandfather, Like Father, Like Son
    BMW

    Comment


      #3
      I doubt the AC has anything to do with this problem. A huge vacuum leak might be the culprit. Do a smoke test.

      Comment


        #4
        Well I got the car to run right, I think, but then the alternator/water pump belt became derailed and the AC belt is no where to be seen.
        1991 325i Calypso Coupe

        Like Grandfather, Like Father, Like Son
        BMW

        Comment


          #5
          A/C compressor seized or about to seize? Try reinstalling the alternator / WP belt and run the car with the A/C belt off and see what it does.

          The A/C compressor puts a substantial load on the engine even when working well.

          Good luck!
          101

          The E30 collection:
          1987 325es M52 - Schwarz / Taurus Red Sport (son #2's)
          1987 325is - Delphin / Black Sport (son #3's)
          1987 325i Convertible - Triple Black
          1989 325iX Coupe - Diamondschwarz / Black Comfort
          1990 325iX Coupe - Sterling Silver / Grey Sport

          1981 Fiat 124 Spider 2000 - Green / Tan
          1998 Volvo V70 GLT - White / Tan
          1998 Volvo S70 T5 manual - White / Taupe
          2001 Ford Windstar - Silver / Grey (parts hauler)
          2006 Lexus GX470 - White / Tan (tow rig)

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