I had that happen when my camshaft was starting to fail. the loss of power was gradual over a month or so.

One day on a particularly steep hill i was frustrated and put my foot all the way down.

A big bang happened as I polished round a few lobes of the cam... then I had a lovely backfire under load but limped back to town slowly.

 

Hit it with a lower gear.
Make sure the waste gate on the turbo is adjusted correctly.
Make sure the injection pump is timed correctly.

Also - if the injection pump is wearing - you'll have loss of power.
Less diesel fuel output

Lastly, your injector spray pattern may be bad too.

And, - you may have lower compression than you need.

All of this matters to a diesel.

I had a BMW 528td.
Not the same engine.
But, a diesel.

My Dieselpumpe finally died.

I put in a rebuilt Dieselpump and
was good to go.

Had a lot of power and NO smoke.
If you jump on the accelerator and have a lot of black smoke, then your diesel pump may need adjustment.

As I recall, there is some rubber tubing for vacuum signals which must be good.

If you are near Germany, there a a few listed on eBay there.

dieselpump land rover | eBay

 

Other memory is valves.

The diesel I had had solid valves that needed adjusting - a lot.
When the valves have clearance you are losing power in a diesel.

 

Had the same problem. Check www.discovery2.co.uk / Waste Gate Modulator - Over boosting

I changed fuel pump and injector harness and serviced. Turned out to be this waste gate solenoid. 10 minute job and problem finally solved


Hi all and damn I just joined and its petrol only lol

 

haha I was going to say, while I adjust the wastegate on my volvo, there's no turbo wastegate on the V8 DII, only TD5!

 

I am faced with same scenario. Over a year ago, I replaced plugs and wires, head gaskets. Thought it may be the torque converter but had the transmission checked out but all is good. I have no codes displayed. Any update?

 

Clogged or partially clogged catalytic converters??

 

That is a consideration. Since this is a problem only from a stop to acceleration uphill, would you also be thinking coil pack, or maybe check the compression? What order would you troubleshoot first?

 

Check codes if you have. It seems normal if the condition is similar as the OP. Remember that 3000 rpm uphill is not enough depending how long and steep the grade is. You can floor it but you have to consider an old truck like this can blow your head gasket again.

 

Had that happen with the P38 too... Turned out it was the fiberglass guts of the resonator clogging the exhaust pipe. Really only noticeable going uphill, but one day picked a really big hill and it just bogged down all the way until had to pull over, found the strands of glass coming out the exhaust pipe, pulled about 25 feet of it out and all was good.

On another note, with the Disco, recently went up a mountain, from around 100' to 5000 ft in less than an hour... Never heard so much pinging in my life!!! Whenever it tried to downshift to 3rd at around 50mph it would start the pinging. no pinging if I just lugged along in 4th at 50mph.

My question, is this normal? It is as though the computer could not adjust the mixture fast enough for the thinner higher elevation air. No codes, no pending codes, etc. I would think I'd get a lean condition code at least, but nothing. Then spent a day at 3500' and went back over the mountain, much less pinging. Now back to sea level and it runs completely smooth again.

Any of you who go from sea level to the mountains rapidly experience anything like this and have an answer or solution?