idle surges

very good, that is mostlikely the problem, is there a check engine light on?

I took a meter and ohmed out the TPS and it checked okay. The resistance increased as the throttle was opened from .3 to 3. I cleaned the connectors and started the truck. It was idling okay for a few minutes but it then went to idling about 3000 RPM again. I ohmed out the TPS again and it was very high. It appeared to be affected by heat when the truck was running. I replaced the TPS again and it seems to be working fine. I disconnected the battery to reset the computer and cranked it up then checked for codes again. I got a 1 1 1 which I believe means it know passes the test. Just for curiosityI ohmed out the TPS again and the resistance reduced as I opened the throttle. I drove it for about 25 miles and it seems to be working okay for know and I hope it's fixed. Thanks for the help and great communication.

no the check engine light is not on

before doing the upper plenum, check the engine coolant temp sensor, and throttle position sensor

Ran test on a snapon scanner all sensors test good. Also checked for other vaccum leaks I singled out each and every vaccum line one at a time.