Wednesday, November 18th, 2009 AT 11:05 AM
I have a 1996 Dodge Dakota 4 cyl. 5 speed. Replaced Cat converter. Replaced spark plugs. When I replaced spark plugs no carbon build up. Plugs were light grey. No engine codes, and the truck runs very good. Good acceleration for a 4 cyl, and very smooth at hwy speeds. But, I only get 16 mpg. Any ideas/