When holding at steady RPM's either driving or running in park (doesnt matter) it sounds like the engine is releasing air. When it does the engine loses power and the rpm's fall. If I accelerate it goes away until the rpm's hold steady again. Any ideas? ? ? ?
My 96 Powerstroke has the same problem, at lower RPMs (1500 range)when motor is cold, while holding the same throttle position. Push harder and it will speed up and be fine. Can hear the same air sucking noise. Any Suggestions?