None of my mechanics can figure this one out. Not even the Chevy Dealership! My 305 TPI starts up fine...the idle is rough and when I accelerate it can be rough. On the Highway or if I just keep it in second, it seems much better. The car just does not like accelerating at a normal pace. If I floor it, it seems to be quite responsive. If you drive it like a normal person, it runs like crap. Some days are worse than others. The car only has 37,000 miles on it. It suns like some gremlin is inside the hood and yanking wires out just for fun! Please help if you can! Thanks!

 

When I had this problem the idiot who sold me the car had the wrong PROM in (had one for a 350.)

 

Check your vacuum lines and make sure none are worn cracked or disconnected

 

I had a problem like this,it was the coil breaking down i replaced it and it fixed it, but it could also be in the distributor cap or rotor button.go to Napa and get name brand parts ive gotten some junk from the other stores (the cheap ones)