Flapping sound when over 5K RPMs

Duc_Z09 · 12-18-2015, 06:47 AM

Quote:

Originally Posted by Bad Boy

It is definitely RPM related. Ive tried checking in gears 1, 2, and 3 and then up shifting, etc.. and it always happens when over 5K RPM. I could be going 80mph in 6th gear and no noise.
I guess It could be described as a knock?
Like I said earlier, I feel its coming from the steering column area, or just right behind the actual steering wheel or gauges. Hard to tell where noises in cabin come from sometimes.

That's a little more worrying then. Are you noticing any other vibrations besides the knocking/flapping noise? It's gotta be something loose that a specific harmonic at 5k is setting in motion.

Was the intake manifold cover (plastic thing on top of the engine) removed and put back recently? That would do it, if it was loose... And it's probably insulated enough from wind that speed wouldn't matter, but rpm definitely would because it's bolted directly to the engine.

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