a.legge

So this started a little while ago when i was pushing it sorta hard it bucked and made a growling sound when the engine was under a heavy load. At first it was periodically so I gave it the tune up it needed, plugs, wires, cap, rotor, and fuel filter. It ran better for a week or so and then it started having heavy vibrations at the top end of each gear and at 45 mph and over. When checking the engine at idle it would be shaking like it was misfiring or something. It would also stall sometimes when coming to a stop or pulling away from a stop. Today I was driving and the vibrations stopped at the top end of each gear but it made this loud rattling/grinding noise at first i thought i was dragging something or a heat shield was loose but sure enough everything was tight. Mind you this would happen under acceleration and slowing down.

sorry for the long explanation I'm just stumped