So I just replaced the motor in my 94 2 door tahoe, its a mildy built 350 that dynoed around 350 hp (not sure on what was done I purchaced it from a local guy it was freshly rebuilt). Every part attached to the motor was replaced water pump tbi all that fun stuff. Well anyways my first initial crank bout mid day it takes about 5 or 6 seconds to fire up. But after it warms up it will crank right up no issues runs good. Now check engine light is on but I have no way to check it atm. I do have headers 02 isnt hooked up and i don't have the second filter on the tbi (breather box). Just wondering how i can resolve this issue.