I have notice when I floor the XJR, it don't reach high RPMs fast, it creeps. I think the highest the RPMs gets at WOT is 5K.

Most YT vids, when they hit the pedal hard the RPM shoot to 6K / Red line very quickly. VOOM VOOOOM VOOOOOMMMMMM. My is vooooooom, voooooooooooom, voooooooooooooooom, voooooooooooooooooom, and this is in Sports mode, non sports is even worst.

I think the SC is working, I do feel some boost at about third gear.

I do have a major exhaust leak (WORKING ON IT), no CEL, adjusted the Throttle Cable, run Premium, fresh tune up, cleaned throttle body, cleaned the EGR ports.

Anything else I should check out?

Thanks
SGB.

 

I wonder if the car has free flowing fuel? Maybe a new fuel filter, it might be a fuel pump on the way out, they R's have two, the second coming on at 3k rpm.

 

New fuel filter - done,

How do I check the dual fuel pumps, I usually do the ear test, if it hummms its working. LOL.