Car was not running well and shaking like hell. Changed plugs, wires, rotor, cap, fuel pump, added dry gas, and injetor cleaner. same same - still shaking like hell. My mechanic looked at it. pulled the injectors and hooked them up to device that pushes cleaner through them for 2 hours. Car idels rough but is a little better at higher rpms. Any ideas? Injectors still dirty?