Inliners International Forums General Discussion Engines carb problems

ive got a 1972 pickup with a 250ci and everything is stock but the air cleaner and a single straight pipe that ends behind the cab

my question is when im driving at a higher rpm it seems like my engine is buffering what would be the cuase and solution to that problem?

Hard to say,but I would guess it might be a little lean?
Because of your air cleaner.
If you still have the stock air cleaner,put that back on & try it out.
Weak fuel pump, clogged fuel filter.
Ignition timeing off?

MBHD

I had a 72 with a 250 years ago and it had a slight miss at higher rpms and tried everything then found out the bearing in the distributor was bad . Took it apart drove old bushing out drove two new bushings in to give it more wear surface then drove it 160,000 miles with no more trouble.