Multiple Misfire Help

[gearheadnate]

Vacuum leaks, o2 sensors are the most common problems I've run into.

[96/chevy/pu]

why not put some orignal a/c plugs back in it, since its all stock

[20''strong]

i had the same problem and it ended up being a plugged cat.

[gavin05]

run a compression test.if it is stock i would put ac plugs in it.ck for vacuum leaks.put a good set of plug wires on it

[chvy=power]

+1 on the plug wires..sounds like secondary ignition problem

[kam2265]

Thanks for all the input we will start trying what you guys have said. I was thinking plug wires too but didnt want to just keep throwing parts at the thing.

[farmtruc]

Could have had a bad plug originally, then when he installed the new plugs, he could have cracked one, it's very easy to do and sometimes you won't even notice it. it won't hurt to check them again.
that many miles, original plug wires?