4000 rpm/80mph engine loud noises y? on 1999 Volkswagen Jetta

engine loud noises and when im on the hway with 80mph my engine does 4000 spins/min y?

Asked by for the 1999 Volkswagen Jetta
Locating and diagnosing the cause of noises are difficult, trying to figure out what is wrong without seeing and hearing the problem first hand is near impossible. I would try to schedule an appointment at a repair shop and insist that you have someone go on a test drive with you so you can have them experience the noise.