Weird idling symptoms

[scenario]

My 86 1D, Most times I start the car up she will idle up to about 1800-2000rpms. If I shut the car off and start it back up it idles normal with no issues at all.

After the car is warmed up if I shut it down and soon after start the car she will idle too low and stall unless I feather the gas pedal. After a minute or two of driving the idle relearns itseld and idles fine.

I have installed a brand new TPS sensor with new pigtail. I have also installed a brand new IAC. When I first installed all this everything was perfect but has since evolved into the above symptoms.

This car is not driven much and prob less than 600 miles a year (maybe less than 300 to be honest)

Anyway, any input would be appreciated.

I am alsomost thinking the Computer or maybe O2 sensor...??? I have no idea

[GAboySVO]

Did you perform the idle setup procedure when you replaced the TPS? Also, new electronics parts doesn't mean they work correctly. My brother replaced his with 2 new TPS's and still could not get his car to idle correctly. He found a Motorcraft TPS at Carlisle Ford National a couple of years ago and that solved his issue.

Double check that the TPS reostat is working correctly, then follow the idle setup procedure you can find here.

https://www.svoca.com/forum/forum/faq-anouncements/frequently-asked-questions-and-rules/69-how-do-i-set-tps-and-base-idle