I have a '07 Dodge Nitro. My engine light came on and it started to idle as if it was going to cut off. The o ly code that came up was the number two fuel injector. Replaced it along with water pump, idling pulley, serpentine belt, and plugs. It ran fine for two days and the problem is back again. Same rough idling and engine light on. Reading no codes found and no pending codes.