Ok, thanks for the advice and procedure for the temp sensor; I had been meaning to check that anyway.

Last night I did verify correct fuel pump, pressure and regulator operation. Then I put a vacuum guage on the intake plenum and verified vacuum consistent with the erratic "idle". Still won't idle below 1200 even when warm and seems to just shut off below that.

Then I shut off the engine and put a vacuum pump on the plenum fitting and am getting a BIG leak somewhere underneath the plenum. I did verifiy both vacuum lines on the bottom of the throttle body were attached but it was getting late so I'll put the guage on those tonight. After that I plan to pump some smoke through the air plenum to see if I can find the leak.

Thanks for the help,

Randy