rough idle sputters low power under load

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.


Thanks Guys

I had a silimar problem with my 1500.

The plug wires were resting on the exhaust. Justby moving the wires it
solved the problem.

"thatbrokeguy" <williamsveen.DeleteThis@comcast.net> wrote in message
news:b438d6a7198a29fdc1bd442738a7385c@localhost.talkaboutautos.com...
> 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.
>
>
> Thanks Guys
>