View Full Version : 87 Pro Star Running Rough after Hot?

05-25-2009, 07:22 AM
I have an 87 with a 351 my problem is after running for a good 45 min perfect, it starts to miss and progrssively gets worse. The engine must be really warm and usally under a load. I figured the coil was bad so I Replaced it, but no luck.* Any one know what is going on, naturally when I take it to a mechanic, they dont run it long enough.