what mods have you done to your truck? fill in your sig please so we can know what else has been done.
you are not going to over fueling on a stock truck.. the turbo will not spool up too fast. this is not a gasser. the turbo won;t even kick in unless you are 1800 +/- rpm or higher.
what intake are you using? are you still using the K&N POS? one of the issues on those filters is that they don't SEAL right. if you are using the rectangular filter, then you might be hearing the filter edges flapping because they don;t seat right.
the best $50 you will spend is going to the tymar type filter. just do it. you will be happy.
any chips? tuner?
if you have been wrenching on it, make sure all your clamps and such are on good, and that the air filter is seated right.
dennis