Do a compression test.
take it to autozone and they'll tell you fro free
Take the vehicle to a qualified alignment shop, they will be able to tell you if your control arm is bent.
Jack it up and spin it.
Which ever one you think may be bent, Just take it out and roll it on a flat surface. If it is bent bad you will have a engine miss on that cylinder.
No. The most common way to tell if a frame is bent is if the roof is buckled.
You can tell a bad valve by doing a compression test.
Take it to an alignment shop.
no you cant
Modulating Valve ???? If you can tell me what system this valve would be in I can tell you the correct name for it and its location. example IPR valve in the high pressure oil system.
The intake valve is bigger.
The intake valve is bigger.
Noisy valve train. Remove the valve cover and inspect the valve train.