I have a 97 Dodge Dakota that the fuel mileage has went to half of what I have gotten in the past I have run a code test and nothing has shown up faulty. Im getting black smoke from the tail pipes which indicates unburnt fuel . I have replaced the plugs and wires and the air filter is clean and no obstructions in the air intake hose but the problem still continues . My normal fuel mileage in the past has been 17-19 mpg hwy but now it is 10 mpg . My question is there a sensor problem that would not show up on the code test ? The engine is a 3.9 and auto trans . Any help on this matter I would greatly appreciate.
- posted
15 years ago