I may be wrong but surely a 1978 Fairmont will have carburettors rather than electronically controlled fuel injection, so the diagnosis process may be rather different from the OP's Honda.

You're right. My car will be getting a carburetor transplant, Friday. It'll cost my entire pension for this month. Not sure about putting a new carb into a 32 year old car. I hope it won't reject it?   

rags