I tried using the moats ostrich and my car started running bad so I pulled it. the car still would not run good so I replaced the ecm now the radiator fan runs as soon as you start it and ac clutch will not engage and runs bad until its warm check engine light is on with no code. What could I have missed up to cause this?

[This message has been edited by Earlhughes (edited 09-18-2018).]

More details.would be good.
Year, engine, etc.....

It is a 1986 automatic all stock V6