I just put in a new motor 383cid. I have 1000cfm throttle body, 24lb svo injectors, edelbrock intake and runners, hypertech coil. I still have the stock ecm and chip I removed the air conditioning and some of the non essesntial emission stuff. It took several days before the SES light came on. But, now the SES comes on every time I start the car. Its showing code 21, 33, and 36. I have replaced the MAF and the burn off relay, but it still throws the same codes. It also idles really rough, at first I thought it was the cam, but I don't think I would be getting SES codes. Do you think that the ecm and stock chip is causing all this? Any help or ideas would awesome..

Thanks,
Joe

 

Well I take it nobody has come across this type of problem before.