[rover les]

2004,170,000 miles TD6

Had faults read,differs between 2 and 3 faults eas and abs.
Just fitted new abs sensor off and new level valve off.
Cleared faults,on test drive I now have a grinding noise and the car wants to stop.on tickover it will drive great,give it some throttle and it drops to the ns and grinds?
Drive further all the warning lights come back on,hdc,air suspension and abs? As soon as the warnings back on the car drives perfect.
When I stop and switch off the car levels itself?

Anyone any ideas?
Every where I have taken it or called has no idea

 

[diff]

What is drops to the ns? What is level off valve? Is that a height sensor for a corner. Check that its installed properly. Possible turn steering lock to lock first. Not sure what else but please report back and welcome. For non mechanics like most of us cryptic messages are of little use so being slightly verbose will expand your chances of resolving the issues. A big welcome to the site as someone here has very likely had the exact issue once we know exactly what it is. In N America we are all gassers until recently but this sounds like a generic issue. Cheers