check this article on the sensors

http://www.hotrodhandbooks.com.au/EMS_2.htm

 

i also found this article on tps this is the best one yet, http://www.wellsmfgcorp.com/counterp...erpoint2_1.pdf

 

just had the tps tested and mine is fine,

 

fixed mine, finally took it to the shop, it was the dizzy! DUH! I new it! Runs like a hotrod now! cost me more than i wanted but it is fixed!

 

A dizzy in a 4.6L or a 5.4L ??? You must be mistaken ...

Oops, I see you have an '80's F150 - not a mod motor, for sure

 

Took mine to Ford (broke down and paid the $80). It's fixed for now, I had two COPS bad, that's why me changing them out wasn't doing any good. Any way, we are both running good now, so good luck and talk to you later.