i have 1994 F 150 with 302 5.0 liter engine while driving on the highway a check engine appreared on the dash board the truck run slow and could not negotiate highier elevation i lost power. when i reached the city, I went to truck repair shop. the mechanic did a series of engine test and found out that the problem is the Mass Air Flow Sensor. the mechanic told me that in order for us to continue our journey he disconnected the electrical harness which is attached to M A F and was told to replace it soon. I was able to drive the truck with no problem and reached our destination. I bought a Mass Air Flow Sensor and replaced by myself, connected the electrical harness and drove the truck. to my disappointment i drove the truck for a few kilometers and the truck lost power again. so i am back to my problem before. to all expert mechanic i need your help thank you.