ok heres what i have done, i have an S10 and have swapped the LO3 and ECM from an 88 firebird, i used the 4.3 wiring harness, and i am poositive everthing is wired correctly, the truck is throwing a code 45, rich exhaust and has been throwing a code for the ESC, 43. my questions are how do i test the ESC sensor, and the knock sensor.