CRIPES!!!! Check engine light....again

[ElusiveYanniW68]

Ok, so I just got my car back from the shop last week (Blown head gasket) I just had a new valve job and resurfaced heads, the bird runs fine but as I was driving today The idle seemed just slightly shaky, when I parked I noticed that there was more noise than usual coming from the front of my car but not quite the engine, upon further observation I noticed that the catalytic converter was a little noisy, almost sounded like a leak or something but the pipes looked ok. I would like to note that I just recently had some Pacesetter headers put on like 2 months ago. I haven't hooked it up to a code reader yet, I plan on doing that soon, If its a p0420 code im gonna be confused because it ran fine for those couple months with the headers on it....did I fry my cat? its a magna flow cat. I wish I was back in Michigan...I wouldn't have a cat

[nascarnate326]

the only experience I have with cats, its taking them out

[jderry]

If your blown head gasket was allowing ethylene glycol (coolant) to enter the converter it can most certainly cause it to fail.

[ElusiveYanniW68]

Today it didn't come on at all, everything seemed normal hmmmm...