I have a vibration when under acceleration.....it starts when i get over 1100rpm. It even does it at idle. Theres no smoke or anything and it seems to have decent power but doesnt pull very hard until after 2000rpm. Im wondering if this is a symptom of a bad injector?

 

Ok, truck didnt want to start at the gas station again today. Pulled the icp...still no start but i did find a bunch of oil in the plug. Could a bad icp be causing my issues? Possibly not a bad injector at all? Itll have to be replaced regardless i guess, but from what ive read this can cause some of the issues im having