I don't have a place to store it while we work on it unfortunately, but head over to
Southern New Hampshire Land Rovers and start a thread as well I have already posted up about you throwing in the towel. We'll see if the other guys have a place to put it and we'll have a club tech weekend and get that beast going again.
If it's something as simple as a misfire coupled with overheating hmmmm...... I begining to think this might have something to do with a plugged cat.
Here's my reasoning:
1. fine at low speeds
2. when pushed loses power, runs rough goes into limp mode
3. starts overheating quick
4. random misfire codes
Also head gaskets ring a bell but I think even dap could diagnose that one....
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91 Range Rover Classic
90 RRC Parts truck
94 Saab gas mileage beater