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HIGH IDLE SPEED 240GL Wagon 200 1986

posted by  B.C. on  Fri Apr 29 18:11 CST 2005
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

The shop is probably one not familiar with your car. After cleaning the throttle body they failed to properly set the TPS (throttle position switch), so the IAC is never engaged.

Quick check: Use a large pair of pliers, and squeeze gradually closed one of the vacuum hoses to the IAC. If the idle slowly drops, and - in fact - the engine dies if the hose is closed completely, it is the TPS.

Check the IAC: Key off. Remove the harness connected to the IAC. Use an ohmeter to check for continuity between each pair of contacts. (I can't recall if your IAC is a 2-wire or a 3-wire type.) If it is OK, the TPS must be reset and your idle should go to normal 750 rpm.

Good Luck,

Bob

:>)





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