1987 Ford 460 engine – Stalls out whiling driving – won't start for 30 min. later. What's the problem?
1987 Ford 1 ton dually w/ 460 engine. Has sat most of the time over the past couple of years. We have replaced the spark plugs and wires. And yes, they are in the proper firing order. This truck starts right up and runs like a raped ape. Most of the time it comes and goes w/o incident. It is used to pull a 4 horse gooseneck trailer and we cannot have it doing this w/ the trailer loaded. It has quit running on us twice now while driving at about 50 mph. At this speed it back fired then just quit running. The rest of the time has been while it is going at about 25 mph. At this speed it just simply quits running. It will crank over but not start. It has been taking about 30 minutes b4 it will start again. Is this an air flow problem, could something have been put in the gas tank? We are at wits end trying to figure this one out.