First of all i'd like to say hey to all... My son and I bought a project S15 jimmy with a bad motor 89 4.3 tbi. We got a donor motor and it started fine. the problem we are having is that the injectors are spraying more like a rain Forest and running very rich and sooty. Tho only code it has put out is the egr, that is new. The 02 sensor, injectors,o-rings, fuel filter have replaced with no change. Now I'm being told that the computer is fubar. Any ideas?