I have a 1990 renix that was just overhauled, new head, rings,rod and main bearings, oil pump, water pump, radiator, cps,tps, map,plugs cap rotor. Before it was overhauled it was running rich at idle.Now after all of these parts it still runs rich. I have a 1989 renix that I have swapped all the sensors back and forth from one to the other. The 1989 runs fine but the 1990 still runs rich. I have even swapped out the ecm.But still the same. My question is does anyone know what would cause this thing to go full rich at idle. Once you drive it down the road it runs good anything over 1000 rpm and it will clean up pretty good. It doesn't matter if its hot or cold. ANy help would be great. Thanks, Pmatinez.