after b18a swap into 90 civic lx. Throwing 2 engine codes: code 14: eacv and code 43: fuel supply system. I think that what i need to do to fix code 14 is check voltage and see if it's between 4.5 and 5. I think i need to replace eacv though, correct me if i'm wrong. The funny thing is that codes are not thrown until i get on the hi-way or been driving for about 15 mins. I have no idea how to fix the fuel supply system? can someone help me with that. other symptoms: Bad Gas Mileage, on 10 gallons i got a 150 miles, 15 miles per gallon sucks ass. mmm got to remedy that. Thanks.