Question about 2001 Chevrolet Malibu

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High Idle and Torque Converter wont lock in all the time

Hello,

I've got a 2001 Malibu with 2 problems. Sometimes when I come to a stop the engine wont idle down. It stays at 1700 to 2200 RPM. And also the Torque Converter doesn't always lock in which I notice by the RPM gauge. With both problems I've hooked up my EZ-Scan 6000 while these problems are happening and haven't seen anything out of the ordinary. The oxygen sensor changes between .1 and .8. The engine is in closed loop.The coolant temp is 195. No check engine light. Thank you for your help.

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  • jimmys333 Jul 23, 2008

    INTERMITTANT HIGH IDLE PROBLEM, TPS OK AT TIME, EGR AT 12% BUT ISN'T THE PROBLEM, NO OTHER CODES, NO APPARANT VAC LEAKS, INTAKE GASKETS REPLACE EARLIER?

  • braeden Aug 24, 2008

    2001 Malibu intermittintly high idles up to 3500 rpm. Wondering what other sencors could cause this besides tps?

  • Scooter1976 Nov 05, 2008

    I have the same issue, recently my connector broke on the temperature sensor and I am thinking this is telling the car to idle high causing the rough shift. What do you think?

  • Anonymous Mar 29, 2014

    lock-up torque converter engages then dis-engages back and forth at hwy speeds. sometimes it down shifts by itself to passing gear at hwy speeds.

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I would check the iac valve on all three of your vehicles and on the ones that are sticking and wont idle down i would also verify that the throttle plate in your throttle body is not hanging up on a bur or something.

Posted on Sep 10, 2008

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