Question about 1989 Toyota Corolla 2 Door

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Low engine idle speed when the air conditioning is running

I have a 1989 Corolla GTS with a 4AGE 1.6 with T-VIS. Whatever it is that raises the idle when the air conditioning is running seems not to be working. As a temporary remedy, I had to increase idling speed to 1500 rpm to compensate for the drop in idle speed caused by the running of the air conditioning. What is wrong? Do i have a defective T-VIS? or is it a sensor? Need your help guys. Thanks.

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  • kevin Hastings May 11, 2010

    Sounds Like (TPS) Throttle Positioning Sensor.or (ICS) Idle Control Sensor. Get a manual and check it out real closely. Sensors add up to alot of $$ ( Hanes or Chilton). Good Luck..

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The ac idle assist may be defective, if it's electric check the fuses if it's vachum operated check for vac. leaks. Also lube cables sometimes they stick Use wd-40 on the cables sparingly don't want dirt to stick to the cable.

Posted on May 30, 2009

  • Bruce Hathcock May 30, 2009

    the ac idle assist may be defective, if it's electric check the fuses if it's vachum operated check for vac. leaks. Also lube cables sometimes they stick Use wd-40 on the cables sparingly don't want dirt to stick to the cable.

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