Hello, I have a 1996 Isuzu Rodeo 2.6 L with 175k miles. It began to idle rough at curb idle and a little higher and mpg went from 21 to around 16mpg. I replaced the plugs, wires, ran two bottles of fuel injector cleaner, checked the PCV valve, verified there were no error codes of any kind. There has been no check engine light. The car runs fine on the rode and there are no fuel leaks or fuel smell. I could verify no vacuum leaks. What else might it be?
Jul 16, 2006 at 11:55 AM