Car repair question on not getting scammed out of too much money
So my engine light went on again. Usually its due to the gas cap loosening, tightend that, didn't help, eventually the engine started running rough, especially when stopped. there was a quiet banging/pinging sound near the muffler.
I am thinking it is an exhaust problem after hearing that and reading my manual. I hope its not a catalytic converter problem.
I was thinking of putting that cleaner stuff in my gas tank at the next fill up to see if that would help.
What are the questions I should ask and what are the reasonable rates of repair? (I live in New England so things are a bit more expensive then some places, cheaper than major cities).