the truck (90 f150 5.0 auto ) runs great pulls fine idles when stopped fine.when i first start the truck it will fast idle but if i kick it down or let it kick down on its own it stumbles and dies unless i keep the rpms up .I have the manual and have cleaned the IAC i have the correct voltage at the EVP from the computer but iam not getting an ohm reading between the EVP and the VREF The tester will beep as they touch but no reading is this just a bad evp sensor and would it cause this.If you catch it and take off and it runs it will not repeat until its totally cooled off again. thanks

 

with no vacuum it says i should have ohms on my multimeter ( does not ) but as i give it vacuum per hose and mouth i can hear the egr valve move and the evp sensor gives a reading

 

Sprayed throttle body cleaner around intake vacuum lines and throttle body while running no changes truck is bone stock low miles and never messed with it has been this way the hole time i have owned (3yrs) 5k miles i just had to keep it from dieing first start up so did not bug me now i need to sell it and i would like it perfect any new ideas would be greatly appreciated . laugh if you can hear me! Is there any body home?

 

Moved this post so you may get help from guys more familiar with that engine.