Well I've been hearing what almost sounds like a lifter tap mainly under load and deffinatly more so when i have the smarty loaded. Some of you mentioned it sounded like a injector hold down was loose so when I took it in to the dealer I told them that and as normal they don't like us telling them anything. They couldn't find a thing wrong like normal. I also complaine about some white haze when towing and that it seemed like it was taking longer for the egts to come down at idle. I got it home and loaded the smarty back up and the rattle/ tap was back so I climbed up and started lookin and feeling everything to find out what was wrong. when I got to the #5 injector line I could feel that it had almost a vibration/knock that went right with the noise yet none of the other lines felt like that, they were all smooth and i guess normal. so what could it be a loose injector or a bad one?