Hi MUDGUTS, no wonder you find no fault codes - how to read and clear diagnostic codes: http://www.lexls.com/tutorials/intro/codereading.html Tools Needed:
Short piece of wire (90-94 LS's).................UCF10/11
Short piece of wire (95-97 LS's) connector DLC1/17pin and DLC2/23pin
OBDII code reader (98+ LS's).........LS400 UCF20/21......