Truck has loud ticking/clicking noise coming from what sounds like like drivers side rear of engine. It is only at idle and goes away with any throttle. I didn't pay attention to it at first but it has only been getting louder. I have tried a good fuel additive but it has not helped. Is this a symptom of a bad injector? Any help is appreciated. Will run balance rates later in the week when i have time.

 

how about disconnecting the harness for that injector? it will shut off four injectors and put it in limp mode but if the noise stops then that should help narrow it down

 

My lly was doing the same thing unpluged the harness connections on the driver side of the motorand it went away. Good luck