Could a bad cat cause a car to only run on 2 cylinders and be all putty.

 

a putty-cat. bahhaha

 

No, a cat just heats up the exhaust gas to burn all the fuel.

IF your running on 2 cylinders you have either:

bad plug
bad coilpacks
a cracked/damaged coilpack harness

 

Ok if that was the issue, would it also throw a code about a bad "cat on bank 1" or something like that? As well as misfire codes.

 

That is usually an o2 code i believe, you need to get the actual code to find out more.

But if you have missfires in just 2 cylinders and not all of them, you should have something listed above along with a bad o2 and /or cat

 

Could the bad plugs/coil packs cause the cat or o2 sensors to go bad or vice versa? I dont wanna get a new cat or o2 sensorsif its justbad plugs/packs. I guess I can take the plugs out and see how those look. Also how do you tell if a coil pack has gone bad? FYI-this isnt on my car,just helpin a buddy out.

 

heneeds codes. running on 2 cylinders would mean plugs/packs/wiring and the code seems like a o2 problem

 

YEah I cant get the actual codes cause his buddy who pulled them wont give themto him to give to me for some reason. Its pretty lame!

 

what an a-hole. i dont get that one.

 

just go to the auto parts store and get you a set of 4 NGK bkr7e plugs and replace them, cheap and easy, then you can go from there