I Have a 94 with a 302 and everytime I start it the engine idles really high for about half a minute then idles normal but when put into gear it will choke off what could be causing this. thanks

 

thats the IAC (Idle Air Control) sensor.... its suppose to do that when its cold

 

What he said....might wanna pull it off and give it a good cleaning with some brake clean. Its on the side of the butterfly valve, just two bolts to take it off and the wire harness. They were bad about getting plugged up with carbon and whatnot, never hurts to clean it up.

 

i am not for sure if its the same problem as me, but in my 1990 5.0 I start it and it runs high for about a minute and then goes down and runs, but right when i put it into gear the truck shuts off. he said idle off and i dont know what he meant by that. but mine shuts off and i have to put it back into park and start it back up, but it will not do that again all day unless the motor gets cool. this happens EVERY SINGLE time i start it when its cold. it sucks. ???

 

mine does the same thing "1990BlackF150"

 

Remove & clean the IAC valve!! (As previously mentioned)

 

Sorry I don't want to sound stupid but where is the IAC valve loctaed at?

 

On the drivers side on the air intake & it looks like this:http://fordfuelinjection.com/?p=39 (also called IAB/Idle Air Bypass + 8 or 9 other names) This link is a must read!

 

Its on the back of the air inatke right? I took it off to find a orange arch shaped thing in there I cleaned it off and it started right up but then died.

 

Are you talking about this, but w/ a small orange thing in the middle instead of the black one shown.http://fordfuelinjection.com/?p=29