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Erratic idle in drive and reverse

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    Erratic idle in drive and reverse

    Hello,
    I have a 1991 325i automatic, whenever the car is in drive or reverse the idle is really erratic and sometimes ends up in the car stalling. I have no clue what the problem could be, do any of you?

    #2
    Do you have a bently manual?

    Get one.

    Check your idle control valve. Get some throttle body cleaner and spray 2-3 second than off for 4-5 second bursts into the intake bellow just after the afm for a couple of minutes, made my idle rock solid.

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      #3
      Yeah I do have a bentley, I'm gonna try that, sounds good :D

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        #4
        I have a similar problem with one of my cars, let me know if this works. :)

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          #5
          Oh man oh man, no more putting the car into neutral at every stoplight and stop sign.

          Yup this fixxed my problem!! I got intake and throttle body cleaner and did as you said, sprayed for 2-3 seconds then waiting around 4-5 seconds and kept doing it until i emptied out the can...Also, I pulled on the throttle while i sprayed it because otherwise the car would die, idles like a rock now :D

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            #6
            where exactly are you spraying the throttle body cleaner?

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              #7
              Inside the throttle body housing,

              from the air intake theres a big hose that connects to the engine, take off the hose on the side that connects to the engine and spray it right in there

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                #8
                Hm, I think I need to do this too. Do you spray it in while the engine is running? Won't the engine just die/shut off without the hose connected?
                1990 325ix

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                  #9
                  Originally posted by SebSter
                  Hm, I think I need to do this too. Do you spray it in while the engine is running? Won't the engine just die/shut off without the hose connected?
                  Not if you keep it running with your other hand on the throttle.

                  "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

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                    #10
                    Yeah, when you start up the engine with the key, quickly give the throttle on the engine a pull or two and then it'll stay alive

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