Ok guys I bought this 91 integra from some d-bag kid who knew nothing about cars for $600. Now I'm trying to get it to pass smog and the check engine light is on. I tried changing all the sensors on the B18A1 and the light did not go away. Took it to a mechaninic and he say the ecu is throwing code 13 and that he thought it had the wrong ecu in it from an automatic, so I bought a 5sp ecu and put it in and the code still comes up. I am pullin hairs out of my head at this point and do not want to take it to a mechanic again and pay $100 dollars to learn from him that the ecu is throwing a code and he doesnt know how to fix it. I would really like some help on this one guys I dont' know what else to do.