I have a 5.0 engine out of an '81 Bronco that I put it in a '85 Bronco II, it cuts out every once in a while when accelerating to hard and will sometimes die after start up. Doesn't seem to be operating to its max power....I have changed spark plugs, plug wires, rebuilt carburator, new fuel filter, and new fuel pump. Any other suggestions??????

sounds like the gas tank is empty

ignition
test everything, coil/module etc

I'd first check my fuel pressure and make SURE the "new" fuel pump is alright.....just my .02

How old is your 302? It sounds to me like its perhaps your timing. First, check your distributer. Is the advance working correctly? If it is, then you will have to buck up and start tearing into your engine. Remove the intake, and valve covers. Check your rocker arms. Pull the pushrods and the lifters. Check them for wear. Get a flash light and look at the cam lobes. Are they worn at all?

A buddy of mine had the same problems with a chevy BB, the lobes on his cam had worn nearly flat.

ya i will probley check the fuel pressure, ignition system and timing and see what i can find hopefully i wont have to take the engine apart dont really got the money with diesel prices. but the engine only has about 100 k on it but thanks for all the input!

Before you tear the engine apart, throw a Vacuum gauge on it and see what that tells you.

You should have steady 15-20" of Hg at idle, without any fluctuations.

If it jumps around you could have a bad cylinder: bent push rod, burnt valve, bad cam lobe, bad injector, etc.

Chris

hey thanks i didnt even think of the vacuum being low i checked for vacuum leaks and couldnt find any thing but ill check it and see what i got!

checked the vacuume and had a good 20 inchs hg at idle and the engine was pretty good in time!

put a dui ignition in the b2 and that fixed the problem i had checked every thing so ingniton was the last thing and i figured make it easy and change it all with the hei style distributer thanks for all the input!