running a little rough

[94yukongt]

Ok so the other day my truck started to run a little rough at idle. It has new plugs, msd wires, accel cap n rotor, msd coil is all new. About a month ago my aftermarket cat was clogged and i beat on it and it blew out some particles and it seems to run better. I think my cat may still be a little clogged which is causeing the running rough issue but idk. please help. thanks

 

[ChiTahoe]

Your ignition seems to be in order but, I have seen MSD wires fail. I would venture to say you should get rid of the cats and replace with a test pipe or replace them. Those cats are definitely effecting performance.

 

[SunlitComet]

I would advise that since you have seen converter damage already you should perform a exhaust back pressure test to confirm that your system is clogged.

 

[94yukongt]

thanks guys. Im looking into doin my whole exhaust over so deff gunna get rid of the cat.