hi my range rover has a tuned discovery 200tdi in it. it was running fine until a few weeks ago, now it doesnt like revving. when driving, it gets to around 2500-3000rpm and tries to cut out. the turbo is working fine, you can hear it whistling. i just took it for a spin around the fields and took it for a quick run down the road, it seemed flat, and again wouldnt go past 3000 rpm, i took it into the yard and kept it running at 2000rpm and it kept revving up and down slightly. i assume it is being starved of fuel. I treated it to a new fuel and oil filter a couple of weeks ago in the hope it was the fuel filter, however it has made no difference. the primary filter by the tank has been bypassed so it cant be this. anyone had the same problem? its getting annoying now.........
any ideas, thanks, oli