Could be some problem causing a too rich condition (IAC, MAF, temp sensor) which may have destroyed your cat by now.
Autozone may read your CEL code, that will be helpful to you or anyone guessing about problems.

The clutch pedal is likely a different issue.

In future, post mileage on car, mods, recent work done, etc.

Carl
1 Lucky Texan

 

First, please double check your radiator and overflow bottle. Soobs are tricky to get all the air out when filling with coolant. Usually need to turn on the heater on full hot, raise front of car, run till fans come on, fill some more as air come out, fill o'flow, let cool, check o'flow, etc.

Anyway, after you get Autozone to clear the code, swap the plug wire with a different cylinder and see it that one trhows a code, also, you can look around at night under the hood, engine running, for high voltage arcing, some folks use a water spray bottle to help find cracked coil packs and bad wires. Um - might be time for new plugs too. Who knows when they were changed?

If this is a used car you just bought, you may need to replace some other parts/fluids. Do you know if the previous ownner did his scheduled maintanence? If not, a lot of stuff id due around 60K miles.
If no one else responds here you might also try the message bd. at www.usmb.net .