hey guys, my cars making abit of a rattling or ticking noise at high rpm and also bogging up. now my mechanic is telling me it needs a dyno tune. (the engine was previously rebuilt). hes telling me that the timing is out and that a dyno tune will fix the bogging as well as the ticking noise at high rpm.

my question is, what do you guys think the problem can be? and also, should something like timing be the mehanics job rather than tuners? i just want the car running nice and smooth.

thanks guys.