jolooote wrote:
Hi, had a 454 for 14 years. Seen it all. Had simular prob. The old coach had settled down lower on the chassis. This allowed the fuel hoses atop the tank to rub on them until small holes developed. When pulling long gradual grades over time air was slowly sucked thru these holes. Engine would act like your's. Pull over, the line suction would be reduced and it sucked fuel again. Another possible...there are two electronic modules in the distributor. They get hot and begin to fail with your symptoms. Replace em.
This is good advice. Years ago I had the same problem in an old 454 P30 but for some reason mine was more pronounced at elevation and when going up hills when the engine was really sucking fuel. Took a few shops to figure it out over a few occasions (it would starve horribly then would be fine for a time), it usually happened when stranded out in the middle of nowhere. The last competent shop found the problem, ended up replacing the fuel lines that were chafed and installed a better electric fuel pump installed near the tank. The problem went away forever.
