93 s-10 blazer 4x4 4.3 (swaped old trashed engine for a 94 4.3 out of a
bravada) ive replaced the cat cap rotor but it still runs rough... at a
steady run if i don't have to get on the gas its fine but under a load the
exhaust gets throaty power drops and it sputters... not a huge loss of
power but noticeable.