Stumped on 86 Buick idle!

[HotZ28]

Sounds like you have tackled the CTS problem.
You have the 5-volt reference signal from the PCM to the TPS and good voltage at idle or closed throttle. I would not worry about the WOT reading if you have a linear increase throughout the range. How is the idle acting now?

[Tooler]

Originally Posted by HotZ28

Sounds like you have tackled the CTS problem.
You have the 5-volt reference signal from the PCM to the TPS and good voltage at idle or closed throttle. I would not worry about the WOT reading if you have a linear increase throughout the range. How is the idle acting now?

Actually its doing a whole lot better but mind you the motor is warm and its hot out,i will see tomorow morning when the engine is cold,when i start it in the morning that will tell the tale,i will post the results tomorrow morn,Thanks again.

[Tooler]

Sunday morning update on Buick idle,its 51 degrees F here, just went out and started the car,it went to a nice high idle,better than it did for a long time,then after 1 min and 30 secs. it went to normal idle in 2 stages, sat there and idled perfect, i only hope it keeps on like this, time will tell. Thanks again for all the help.

[HotZ28]

I love it when a plan comes together! Unfortunately it is difficult to diagnose problems without the car in front of you. You were able to give all the correct information and made the diagnoses less complicated. If all people were as persistent as you, diagnosis over this forum would be a lot easier. Thanks for all the information you provided!! I hope all goes well.