2002 Chevy Suburban V8 Four Wheel Drive Automatic 87K miles
Getting diagnostic codes PO 171 and PO 174. Have replaces TPS, MAS, plugs and plug wires, all three O2 sensors, and fuel filter. Engine misfires noticeably when cold and then very slightly if at all when at temp. I did notice the output side of the fuel filter was extruding a black fuel residue. I did run a can of good quality fuel system cleaner thru the system but still having troubles. Thanks for any advice.
Monday, January 14th, 2008 AT 7:24 PM