Range Rover 4.6L P38

1998 Land Rover Range Rover 4.6L Description

Selling my 1998 Range Rover 4.6L P38 @ NO reserve -- Truck runs pretty well, and I know these are becoming harder and harder to come by, so it kills me to get rid of it. The 4WD engages perfectly, and I just recently installed a new mass air flow sensor, electric fuel pump with filter, and fresh plugs. Has 152K original miles on it, clean on the interior, leather in good shape with most wear on drivers seat, and all power units work i.e., windows, sunroof, etc. The radio however does not work properly, but there is a disk changer in the back if you know how to fix. It's the original stereo so nothing spectacular. The exterior shows its age, as there are a few small rust spots here and there on the body and some on the back hatch also. Overall I had a blast in the truck.
Full disclosure and the recent issue -- I've driven the truck multiple times since I've had it the past 2 years, but for some reason now when given some pedal seems to struggle a bit and can't get it to go over 35-40mph unless on a long stretch of highway. I've read a few things online as to how to repair, but to be honest I don't have the time or know how with this vehicle. Been told it could be the camshaft sensor, Schrader valve on the fuel rail pressure, or vehicle speed sensor / transducer on the side of the tranny transfer box (this sensor provides road speed data to the ECM. The ECM in turn detects the vehicles movement form the road speed input and ensures the idle air control mode is disengaged). Also, if it sits for weeks at a time, the battery will drain, so it's drawing electricity from somewhere - this was not always the case and could be as simple as a fuse somewhere. The check engine light will come on every once in a while, and may need some brake love as it sat this winter since I drove my car instead. I'm not 100% certain on either of them, nor do I have the software to test the codes and continue to guesstimate.
I'm a very handy guy and can fix most all cars, but don't know enough about Euro vehicles which makes it hard to diagnose anything unless you're familiar with them. I live in Chicago, but the truck is back at my folks in Indiana -- Maybe someone has the time to tinker with this truck or knows exactly what the problem is if you're a Rover guru and want something to romp around in. Unfortunately I cannot offer any kind of warranty or anything, as I don't know what's wrong with it, and it is in fact a used vehicle so I'm selling as is. If you have any questions, please don't hesitate to ask and I'll be sure to answer them to the best of my ability or send any additional photos or anything you need. Thanks for taking a look.