Hi everyone, I have a 03 KW900L w/ a cummins isx pre egr 700K miles,and at 65 mpg i'm getting a slight miss and a check engine light. does anyone know how to retrieve the codes from this beast without a scan tool.?
BTW my air restriction guage is reading 40-50 hg. should i change the air filters. I'm an ase cert auto tech, but havent work on to many class 8 trucks, mainly class 4-5. I dont have the cummins operators manual neither the kw owners manual.
Thanks.