1993 BMW 325 Car accelerates as soon as its turned on

1993 BMW 325
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BM DUBYA
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1993 BMW 325

As soon as I turn on my car it accelerates up to 3000rpms and comes back down to zero. It does this over and over and it starts going higher and higher. i dont even push down the gas. Any ideas what my problem may be?

Ive replaced: throttle position sensor, mass airflow sensor, air mass sensor, all were previously used.
Oct 17, 2008 at 10:47 PM
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DOCHAGERTY
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Might be the idle air control is faulting open.
Oct 18, 2008 at 9:48 AM
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BM DUBYA
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I replaced my idle control valve, now my car goes up to the same RPMS but it doesn't come down could it be that my throttle position sensor is no good?
Oct 19, 2008 at 12:48 PM
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DOCHAGERTY
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It is possible the TPS is bad, have you tried unplugging it?
Oct 19, 2008 at 1:44 PM
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BM DUBYA
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yes but it doesn't make any difference when we do.
Oct 20, 2008 at 5:43 PM
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DOCHAGERTY
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Installing used parts is often hit and miss, there is little for me to advise you on with too many variables in the equation, good luck. ♥
Oct 20, 2008 at 7:48 PM