I picked up a 91 K1500 with a 350 and a 5 speed. The PO installed a Jet 6 Pack chip. The truck has a air pump that is making noise and the pulley is wobbling. So I am planning on deleting it. So I un plugged the wires to the pump and after 20 min of driving I never got a CEL. I know the light works because it comes on for a moment at each start up. Would the Jet 6pack turn off the air pump code? I also tried this with the EGR and still no code. Did the Jet turn off the EGR code as well?