I feel that it is engaging and disengaging as needed. Where can I find more info on the supercharger on my 2019 XJL? The dealer says everything is normal but I hear sounds I've never heard before. It has a rough, raspy sounding idle too, yet the inside is super quiet. Although I hear a supercharger kick in (I think) under high acceleration. There's some sort of roaring sound coming from under the hood around the driver's side that kicks in for a few seconds. I have no idea what that is and the dealer is clueless.

 

Are you sure it's not the Sound symposer?
The noise feedback system generates a sporty, powerful engine sound in the passenger compartment, at high engine load and speed settings, to enhance the driving experience... The symposer system modifies induction sound waves of a specific frequency range, at given engine settings, to produce the required engine sound.

 

It sounds like it's coming from under the front left hood. Like an actuator kicking in, then a muffled roar. But iff I let off it stops, if I keep accelerating it continues longer. I had no idea they would need to use that on a 5.0. I mocked BMW drivers for that. Would the sound be coming out of the speakers?

 

Do you have a video? This is fairly moot without some documentation since sound can be really subjective on these cars. People think high pressure fuel pumps are noisy, but they are just like that.

 

No the noise comes from the intake manifold and is piped into the passenger compartment thru rubber hoses. It is controlled by electric valves operated by the PCM. Nothing comes over the speakers but that technique is used on a lot of other cars as this cabin enhancement is now common.

Enters just about in the middle of the firewall up high. Has a little trumpet/funnel looking thing attached to the firewall. And of course it pretty buried so hard to get a look at.
It's easy to unhook and I plan too as it just sounds odd to me?

Apparently on the later F-Types the factory dropped the symposer completely.
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