460 Ford engine problem

R Shofner wrote:
...snip... I probably should have started there because the fuel pump wasn't the easiest thing to replace. Lol! I'm sure it didn't hurt anything though. The old fuel pump had a date of 5/4/2000 on it...

This is a very good case in point why you have to watch out about what you read on this forum. The concept that the fuel pumps are always bad on the 460 due to design flaw is true, but I'm guessing 99% of them have been replaced over the years. Last year for the 460 was 97/98 not very likely many have the old pumps still in them if they were bad. Replacing the fuel pump is an expensive and labor intensive job, one that should not be done first thing based on no evidence (i.e. fuel pressure.) Also the belief if you go under 1/2 tank on a MH you'll burn out the pump. That's 40+ gallons of gas, most cars only have 12-19 when full. How crazy is that.

As far as your problem is concerned I doubt it's a vacuum leak if it runs for awhile then stops. Still seems fuel related and I would highly suggest misting carb cleaner to see if it keeps it running when it stumbles.

I have seen vehicles that when they get hot a short in the electrical system happens. A very hard thing to figure out. You could have a bad control module or a bad pickup in the distributor going when the engine heats up. The comment of mouse damage is a good one, and looking for sparking when it's dark is an old trick also. You may have a cracked distributor cap that is arching and you won't see it when it is light out.

I don't think you'll get a good enough code to debug with since that vintage didn't log much. Wish I could be of more help, but you got a very tough one going on there.

As Red Green says "we're all pulling for you."