Ok posted before, just got questions. First time I lost my engine bearing it was loud as hell, constant with the rpm, and indeferent to throtle position. It also threw a flashing cel. I think that is a nock sensor. This time the noise is more"hollow", like a rattle not a nock, and it is speratic as hell. Somtimes it starts at 25g, somtimes at 35g. Somtimes it is loud just coming off the throtle with a load, somtimes not, somtimes it comes with the slightest push on the gas(before the engine spins), somtimes not. I also have not gotten a cel, flashing or not. Also, at the same time the noise manifested itself, my imrc linkage gromets went bad, and the imrc linkage rod was loose. Was this a conisidence? Could somthing have happened to destroy the gromet? The gromets were completly gone, so I couldent inspect them for heat, or stress cracks or any thing like that. Just wanted to know if the differences mean anything(like not internal). Thanks all.