MAP sensor. After all I've done a guy with a nanocom and some spares sorted me out :) Whoever called it, I'll listen more attentively next time.

Tried that, made absolutely no difference.

Yes mate. Changed all for silicon.

Only once it's warm. When it's stood over night it runs amazingly until the temp gauge needle gets to the right edge of the blue strip...

Scooby22, Next time I'm out and the problem manifests I'll pull over and disconnect the MAF, see if that makes any immediate difference :-)

johnlad, I'm probably going to drop the tank and check for muck as I have run it very low a couple of times...

Hey pos110, wastegate checked and replacement turbo fitted. No change :(

Interesting question... I bought it from ebay as advertised: FOR LAND ROVER DEFENDER 2.5 TD5 DISCOVERY MK2 2.5 TD5 4x4 1999-2004 MAF SENSOR

I've not spent a great deal tbh... Less than £200 and most of that was borderline necessary, and the turbo I can get back most of what I spent if I don't want to keep it as a spare. The difficulty seems to be diagnosing the problem, or finding someone who recognises the symptoms. Plugged it into...

So, today I changed the fuel temp sensor and blanked the EGR, with no change to the hot running problem. Cold it runs like it's brand new but as soon as the needle reaches the right hand edge of the blue strip on the temp gauge throttle response dies until the engine runs above about 1800 rpm...

Got a code: 57 fuel pump drive load open. Does this mean I need a new pump ??? On the plus side I now know a lot more about my engine lol

Well, not the fuel pressure regulator then :(

Yeah, I've seen posts re nibbling out a hole to access the pump. I've ordered a pressure regulator refurb kit and I'll see if I can find someone to test the fuel pressure after the filter if that shows no joy. The fault is pretty much constant once it's warm now so I should get a show on a test...

Uhuh... Serviced just a few weeks ago. It's odd. Feels like fuel starvation but boosts like a demon when the revs pick up. Reckon I should try a fuel pressure regulator rebuild ?

Sounds similar. It seems fine on cold mornings like this morning and only gets sluggy once it's warmed up... Is there a cold start/choke type mechanism ?