1990 ED4 ecu codes

[Ewreck661]

Ok. Ive got a 1990 civic ED4 with 3 ECU codes 10: intake air temp, 12: EGR system, 14: electronic air control valve. Ive replaced my intake temp sensor and my EACV with no change to my ECU codes, I've given my EGR valve a thorough overhaul with no change.She runs like a champ and my exhaust smells great but i cant pass smog until i get this light off. Is the code a combination to describe a larger problem or am i having a ECU malfunction, or a bad line or ground? could really use a hand if any one has any good advice.

 

[stcopley]

Please limit posting to one post per subject needed. I assure you that a mod will delete the second post when he/she sees it

 

[stcopley]

My phone double posted...delete