331strokerstang

I have a 1987 Mustang GT 5.0L 5spd, when i first go to start it up, it starts, then spudders and dies, unless i give it a little throttle, if i give it too much it sounds like it just sucks air, and dies, I have replaced the Engine Coolant Temp sensor, Air Charge temp sensor, its a speed density car, and its stock, i swapped the throttle body, off of a good, smooth running 5.0, and still have the same problem, it also surges, but i havent checked the voltage reading on the TPS, what should it be? PLEASE HELP ASAP!!!!!!!!!!!!!!

FORD TOUGH

Have you checked for a vaccum leak? Have you checked for codes?

F150 StrokerCobra

Clean the IAC see how it reacts

fivepointowned

the sucking air and dying thing and idle surging you wrote makes me think its a vacuum leak. i,m always in a hurry and forget to hook them back up. how did the car run before you changed the throttle body.sometimes the newer pvc have a extra vacuum that must be plugged they sometimes fall out and need to plugged back up. it happened to me and took a long time to find it. had the same symptom you described