In my mind I imagine the VVT noise as a lot of intricate parts politely conversing with one another.

 

How many miles on your rig? Might be piston slap. The VVT noise is actually quite subtle. Try some MOA addative.

 

My '06 V8 Northstar has always rattled from brand new. It sounds like a diesel or a '49 Oldsmobile with a bad cam but goes like stink. The noise comes and goes with very slight changes in throttle pressure. It's quiet at idle but just as soon as the RPM comes up enough to raise the oil pressure to where the locking pin is withdrawn the torsional vibration takes over and noise increases.

 

it has 199 thou on it... it don't sound like piston slap... it def is comin from the top of the motor... like i said soon as the heater or the ac is on it goes away... and your hear it at idle u go up with the throttle is goes away

 

Low oil will make it a LOT louder, even more diesel like sounding.

 

There is a pin that locks the sprocket to the cam at low speeds. This pin wears and rattles with old age. As engine revs increase, oil pressure withdraws this pin. At this point the actuator can make rattling noises that come and go with a multitude of different conditions.

 

so ya would have to change the sensors then

 

Actuators, and it would still rattle because there are a multitude of parts in play and more than enough torsional vibration to make them contact one another.

 

Normal behavior for the 4.6 VVT engine.

 

guess i will just leave it be..

 

If it ain't broke, don't fix it.