A good way to test that you are having the same issue is to put the machine in P or N, rev the engine to about 4,500-5,000 RPM and slowly let off the throttle. If the RPM drops off at about 3,800-4,000 RPM's down to idle, you know you need the adjustment. That's been a very common symptom and is what causes the machine to drive like crap at low speeds.