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'96 E38 - engine randomly tries to die with A/C on

Discussion in 'E38 (1995-2001)' started by jmlarson, Jun 1, 2008.

    jmlarson guest

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    Anyone have experience with this?

    I turn on the A/C - no problem. Runs fine for a while, and occosionally, particularly at idle or low RPM, the engine just tries to die. Seems like a fueling issue, not ignition.

    I also smell a bit of fuel after shutting the car off.

    No problems at higher RPM - EG greater than 1500ish.

    I live in Phoenix, outside temp is about 100, although dash outdoor temp is reading 115.

    Maybe my additional fuel injector (the one that squirts into the plenum) is loose / dirty / dead?

    All thoughts welcome


    Gatsby740iL guest

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    I'm leaning towards the AC Compressor itself as another possibility. When it engages, it will cause extra stress on the engine (as you probably notice when you turn the AC on under normal operating conditions.. the RPM's will drop slightly). And I've seen it where if it's faulty, or 'on its way out', the extra added stress (especially at low RPM) can cause the cars engine to sputter or die out completely. And the reason you don't notice it at higher RPM (even though it's probably doing the same thing) is because you're 'overworking it', if you will, thus causing further damage to the compressor itself.

    Before I investigate the list of fuel possibilities I compiled for you... or IHKA power supply (or Heater Valve, or Pressure Switch, etc..), I would check the compressor itself as the probable cause. Have your Indy, or local BMW Center, see if any codes are popping which would also point you (them) in the right direction.

    Good Luck. :cool:

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