1989 Ford F150 please help!
I have a 1989 Ford f150. It has strait pipe duel exaust. what my problem is is that when im driving around 90 km/h it has a bad skip. when i go slower its fine. i was told that high speed skips are usually bad plugs and wires. soo i put injecter cleaner threw it, nothing. New plugs, nothing. and new spark plug wires and again nothing. I took off the distrubuter cap it looked all good. I dont know what it is, and its drivin me crazy, can any one help me please!!