I'm still getting 9.6 miles to the gallon around the clock. I was stold that I should be getting between 11-15.
1.Replaced plugs and wires with factory parts. 2.Put in a new air filter 3.Changed oil to 5W-30 SyntheticWill a tune-up at a shop still help even though I already replaced the plugs and wires?
Will changing the Oxygen sensors actually help? (Expensive) I also tried before on a 1994 Z-71 and saw no difference.
I unplugged the MAP sensor with the truck running and the truck ran real bad and when I plugged it back in, the truck ran fine. Could I still need a new one?
What should my next step be? I really like the truck.