My 1999 Expedition, 4.6 l engine
is not driven much. Yesterday I was running some errands and the engine started knocking some after a few minutes, the check engine light came on. I checked under hood, removed air cleaner and cleaned it. Light is still on.
JA: Does the light stay on, or does it blink?
Customer: stays on
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: As I said, I cleaned the KT perm. filter. That is all, so far. I prefer to fix myself, to a limit.
JA: Anything else you think the mechanic should know?
Customer: Car has 115,000 miles and is driven seldom. No major work has been done on the engine. Plugs changed @ 100,000.