Two strange (possibly related) issues: 3k RPM rev limiter? And "whooshing" noise.
Strange issue I came across yesterday:
Just had some tires put on the truck 2 days ago. I had some unusual road noises and other noises with the old tires so I've been listening for other sounds with the new (different brand) tires for the last day and a half. I noticed on the freeway and on regular roads yesterday some kind of sound, similar to air escaping from somewhere, but it's only happening when I'm pressing the accellerator. Doesn't matter the speed of the truck.
When I was at a red light, I decided to put it in neutral and rev the engine so I could try to hear the sound better without the road and wind noise of the truck moving. I was trying to rev the engine to a relatively high RPM, but not to redline or anything. Anyways, something strange happened. Once the RPM's got to 3,000 it wouldn't rev any higher and even though I was holding the pedal down, the tach kept bouncing off of the 3,000 mark, almost as if it was hitting a rev limiter. I tried this multiple times over the course of a few hours to see if it was just a fluke thing but it kept happening.
Now maybe I just never tried reving the engine that high before (I don't recall if I have or not) and am just now experiencing this for the first time, but does this sound normal? Also, does anyone know what the sound of air escaping from somewhere could be coming from? For what it's worth, I didn't notice the air sound up the 3,000 RPM that the truck would rev to, so it seemed like it was only while moving, but only while moving AND pressing the accellerator.