Wife was taking the kids to theme park on A24 on Friday and experienced a sudden loss of power, “Reduced performance” message appeared then car basically coasted to 30 mph. I recovered the car, and it is smoking out RH exhaust almost as if over fueling or turbo on the way out. I removed both MAP sensors and rh one was fairly oiled up. Started the engine with both removed and very smokey out RH one but not as bad from LH one. Engine is rough at idle but smooths put above 1500 rpm (no power) . Any pointers would be appreciated as if it is a turbo issue then not sure it is worth fixing.

Sounds like a turbo.

Why isn't it worth fixing? 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Bits wear out or fail. Stay with it and fix it. If the Turbos gone you would have to fix it anyway if you chose to pass it on, wouldn’t you? 2006 2.7 TDV6 HSE in Cairns Blue.

A 2010 TDV8 has got to be worth £10k or so. If you like the RRS my experience is that its worth sticking with it rather than just chucking it away. Yes it is a money pit but the converse is that its great when its working. But of course we all have different circumstances and tastes. Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

I guess my response of “not worth fixing” is out of sheer frustration. It was probably one of my worst weeks in the last 10 years with everything going wrong that could go wrong and then to crown it the RRS packing up during mid term break as well. It is a great car when all is working.

Aha! With you now. Best of luck sorting it. Guess your best bet will be a really good local Indie to give you a full assessment of the overall sate of the car - where abouts are you? Whilst it could be turbo(s) there are other things I've read about on here that might also be the problem - split hoses, manifolds etc. Don't give up. There's a lot of expertise on here as well (myself NOT included! ). Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5

had the same issue with mine a while ago,,, was the EGR valve. normally not so much an issue with the V8 compared to the V6. have it looked at, if it is one of the valves it can be fixed for a few hundred quid,,,, but i would bite the bullet and do both valves if one has gone the other will be just behind it and it will work out cheaper in the long run to get the pair done together. 2010 RRS, TDV8
bali Blue / colour coded
side steps / flappy paddles
black perforated leather
22" overfinch
heated everything, TV,fridge ...... now with gold calipers and mud flaps !( black mud flaps that is) !!
Many years ago,,,,, 1955 series 1 landie , sometimes wish I had kept it

TDV8 EGRs are more reliable than the TDV6 ones. The Turbo is a known weakness. It's worth noting that the PCV valve vents in from of the RHS turbo. Maybe a failure there is causing an issue? 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed