We have an 01 LR discovery 2
Back in November we noticed when accelerating the rover was very slow to accelerate, we were driving on the highway and it maintained speeds without an issue after that. Got home parked it, next day it would start but wouldn't move and then it wouldn't start at all. We thought it got flooded so tried to take spark plugs out and the wires broke. We bought new wires, new injectors, new spark plugs, changed all that. Got it started again, it was driving fine and then the acceleration issue started again, while driving it on the highway it maintains speed, once we got home and we parked and tried to put it in reverse, it bogged down once again.
We were able to get some codes from it, mostly the O2 sensors. No engine lights on and no other codes.
Any advice?

 

The cheap easy first step would be to clean the idle air control valve good. Mine was behaving similarly. It would idle, but give it any throttle at all and it died. No codes other than the missing O2 sensors (waiting on new cats). Cleaned the IAC and the issue disappeared.