1977 ramcharger w/440 need answers please!

[jacobbruning]

my ramcharger runs great for about an hour and then loses horsepower,starts dying on me and when I try and start it it just backfires.I've tried switching carburetors,and still nothing.I have also replaced my ballast resistor,voltage regulator,coil,plugs,wires,air filter,thermostat and still have not fixed the problem.if anyone has any info I would really appreciate it.it starting to drive me crazy.

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[DustDevil33]

Have you checked the timing? how many miles are on the motor? Almost sounds like a distributor or vacuum problem. Check all your vacuum lines, you may have a pinhole in one that only shows when warm. Good luck, it sure sucks when a problem is hard to diagnose.

[Bushmaster150]

How about vapor lock? Try to insulate or move your fuel lines, hot summertime weather may be playing games with you! LOL!

[goddad]

You might think about checking your ignition system. There could be a bad capasitor and or resistor. I ran this by a mechanic friend of mine and that is what he thought of too.

[jacobbruning]

i changed my ignition module and still having problems.now its starting to die right when i put it in gear.when i finally get it going if i give it to much gas it just dies. now it doesnt even hafto warm up.could a bad alternator cause any of these problems or maybe even a bad fuel pump?

[moparborn]

Next time it dies,immediately check for fuel flow from the carb and spark at the plugs and go from there.

[ducktail]

That sounds like a timing issue, particularly since you just changed the modules.