poor power at low engine speed

[FONT=&quot]I have recently got a Landrover 101 FC with a diesel 200 tdi engine fitted and 5 speed gear box. It seems to have very inadequate power at low revs, and then a huge kick as the engine speeds up. This means that it is very difficult to maintain speed if I change up a gear, as the slower engine speed means there is not enough power to accelerate. Could the problem be with the adjustment I can see on a valve in the exhaust side of the turbo unit? I welcome any suggestions on how to overcome or improve the situation.[/FONT]

You sure its a 200 as the valve you are talking about could be the egr valve and to the best of my knowledge was only fitted to 300tdi from late 93 onwards even the early 300 didnt have this valve.
If its got v type drive belts its a 200 and if a flat type modern belt its a 300.
Is the little 6mm plastic pipe attached that runs from the injector pump to the turbo?


Lynall


Lynall

Yes, I am told by other local Landy experts that I have a 200 TDI. It has a ‘V’ belt and not the Serpentine flat belt system I have seen on 300tdis.

The valve may be an EGR, but as far as I can see there is no recirculating pipework. It seems to be controlled by an adjustable connection to a bellows like gadget to which two pipes are connected, one to the top of the injector pump, and another goes forwards somewhere. It seems that the engine is gagged at low revs, but suddenly has lots of power once the turbo kicks in.

I am used to driving Renault Master vans which are very powerful at low revs. If they come to a hill it seems the engine just pushes harder. But even a small hill is a struggle for my 200tdi.

I was thinking of playing with this adjustment but thought to post on this web site first to see what experts say about the idea

is turbo on top of engine with bellows bolted on aluminum snail housing with rod going to cast housing of turbo

Is it like this, on the manifold at bottom of pic?

No, the turbo is mounted on the nearside of the engine, and is not easy to see or access, because the co-driver seat is right next to it. The air intake filter is in the cupboard accessed from outside the van, and it has a large pipe to the turbo and then a tortuous route to the intercooler mounted in front of the radiator in void behind the front grille. It is too dark now for me to take another look at the layout, and the van is already packed full of things for work tomorrow. I will have to lift the floor to get a better look at the situation tomorrow afternoon, and will report back.

PS I do notice a lot of black oil running from one side of the intercooler, but can’t reach it yet.

so is the one in picture,which disco 200 def 200 turbo sits higher above engine same side

What a fantastic picture Gratch!

My engine seems to be just as illustrated – but there is no way I can see it from this angle. It shows me all kinds of things I have never seen before – like where the dip stick is situated. I have an air pipe right over it. The picture shows the cylindrical gadget I have called a bellows, and the adjustment arm and what I assume is a butterfly valve inside the outflow from the turbo. It must get very hot there!

I have not reached past the bellows gadget yet to see where the pipes go but I can see one goes to a canister on top of the injector pump. I am wondering if this valve is not working properly so it causes the engine to lose power at low revs.

the other should go to outlet on aluminum turbo housing it takes pressure from turbo to fuel pump to give more diesel as boost increases and to wastegate actuator to open waste gate on turbo to stop over boosting,wastegate been your butterfly valve

The gentlemans 101FC has a disco 200TDi in it, with a 'fender LT77 'box, and a disco 1.22:1 LT230 transfer box.

The valve he has seen is, i think, the wastegate actuator.

Its a very interesting vehicle! And the gear change linkage is pretty unique i think.

After driving my s2 tdi today i reckon your engine may be fine.
Mines a bit flat of the boost but goes well when on it just as yours does.
But the same engine in my defender seems much better so maybe its just the gearing?
You cant compare it to a modern common rail diesel for power delivery etc


Lynall

Odd, my S3 200tdi has tons of grunt off boost, might be worth giving your smoke screws a turn or so in, bring the off-boost fuelling up a tad.

This is welcome news - that your 200 TDI has plenty of power. I'm sure there is something simple wrong with mine because other old Landrovers don't die when they change up a gear. Can you explain in very simple terms what I could try to rectify the problem?

Boydy has actually seen my beast, and he seems to be very knowledgeable indeed on old Landrovers - if not also newer ones. As he says, I have a very interesting vehicle - but I hope it will be even more interesting when I have completed my plans for it!

boydy1989 said:

The gentlemans 101FC has a disco 200TDi in it, with a 'fender LT77 'box, and a disco 1.22:1 LT230 transfer box.

The valve he has seen is, i think, the wastegate actuator.

Its a very interesting vehicle! And the gear change linkage is pretty unique i think.

Click to expand...

Could the Disco transfer box be the problem? I've read loads about the effect these have on the gearing, with comments about them being almost undriveable, and needing lots of gear changing to keep them on the boil.

i think you are right 1.2 disco box will be too higher geared for 101 1.4 would be better