High Idle and Torque Converter wont lock in all the time
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.
Re: High Idle and Torque Converter wont lock in all the...
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.
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This can be either an engine management issue (bad idle air control) or a transmission issue if an automatic trans (torque converter lock up problem). Idle air control can often be cleaned so = cheap fix. Trans problem not so easy.
Do you have any codes? If so, what are they? If not, this could be a mechanical problem with either the torque converter itself or some sort of stuck valve in the valve body inside the transmission. I just replaced the valve body in my wife's 1999 Mercury Sable and it cleared up a number of problems she was having with shifting and torque converter lock up. I hope this helps. Good Luck!
If your Escape is v-6 powered a common problem believe it or not is a solenoid in the transmission that allows the torque converter to "unlock" at idle. If the solenoid is bad then the torque converter stays locked and puts a load on the engine causing rough idle in gear at stop.
SURGING COULD BE FAULTY FUEL PUMP OR IDLE SPEED CONTROL GOING BAD OR TRASMISSION TORQUE CONVERTER WILL CAUSE ENGINE TO SURGE WHILE ITS UNLOCKING AND LOCKING UP DUE TO A FAULTY FAULTY TORQUE CONVERTER CLUTCH SOLENOID.
Yes, sounds like the idle speed is too high. If you keep driving like that, you will fry the torque converter / turbine. Since idle is computer controlled, you will have to take it for service tune up. There is one possibility that the rich, high rpm idle used for cold start is not disengaging properly after the engine warms up. Air conditioning will raise the idle speed by a couple hundred rpm, so avoid using it until you have the problem fixed. BTW.....warm engine rpm in idle, and neutral should be around 700-800. Anything over 900-1100 will result in a hard shift into 1st gear and dragging at stop lights.
How is your engine at idle?
It should be not less than 700 RPM.
1-If it is not then you can raise it up.
2-If your idle is OK then need to have transmission checked for torque converter lockup problem.
I have a 2001 base impala and 6 months ago I experienced the same problem. I was driving on the street and all of a sudden my car acted as if it was in neutral. I pulled over and neither of the shifts engaged. The dealership said that my torque converter went bad. Somehow the bad torque converter caused shavings to get into my transmission. They gave me a new torque converter and flushed my transmission. My transmission was almost 2 years old; therefore, it was under warranty.
sounds like the torque converter lock up might not be disengaging. You might also want to check for engine vacuum leaks. Does engine idle smoothly when in park or nuetral ? if the idle is good I would suspect torque converter problem.