check your air filter and fuel injection pumps, if you dont see a problem then inspect your emissions system. your welcome for the help
Replace the cam timing / speed sensor - about $75.
check fuil mixture
try to dial Dow your your gas intake on your carb, if that dosent work maybe your timing is off
it onley does that because its a Chevy but u should try new plugs
try testing the battery
You need to tell us what the problem is(wont start, backfires,etc.)before we can give you an idea to try.
check timing belt/chain sounds like valves not timed properly, or not closing completely
Did you check your starter?
if it backfires it could be timing or else you have it flooded from trying to start it. You didn't say if the engine is carb or fuel injected. If it is carbed, let it sit for awhile to let the gas drain out of the carb. If it is fuel injected then it is probably timing. year make and model of vehic and millage
I would try replacing the fuel pressure regulator. That was my problem.
sounds like a weak battery or poor connection
Try changing the oil filter.