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200 tdi engine


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evening all

I have been searching the forum for a while now I cant find anything that is specific to my problems. ill start from the beginning.

when I brought the defender all seemed OK for the first 2 weeks, except the temp gauge used to read just before hot all the time (was only the sensor)then the exhaust fell off and clutch failed. was then I met a few others with defender owners and began wondering why mine was so slow, top speed of 60 mph according the sat nav and completely flat in 5th. I originally put it down to the tyres which yourselves was standard fitments, then I started doing some investigating. gave it a complete service, injector cleaner in the filter, new lift pump, checked leak off rail, turbo boost pressure, the hose from the turbo waste gate to the injector pump clear. inter cooler pipes and inter cooler. it wasn't until I tried revving it off the the pump that I noticed once revved up quickly that when let off the engine returns to idle then momentary tries to stall it self, almost as fuel starvation.

I have ruled out all possibility of air leaks, etc . it doesn't idle roughly, is not noisy, does not smoke or burn oil, good compression. the last thing that is left is the fuel pump and injectors. is there anything that I can do check this? I was thinking of richening it a bit to see if that helps and pull the diaphragm cover off and see where that is set or could it be the diaphragm is not working with the turbo, hence not increasing the fuelling, lack of power, more air and not enough fuel hence why it stalls then recovers. it has done 200000 on the clock and n its life time had the head of and injectors replaced at 1570000.

I am honestly ready to drop the engine out and stick a disco 200 tdi in it and keep the defender turbo and manifold as I am fed off lorry's over taking me and hills being like climb Everest.

any ideas and help would be much appreciated.

tom

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Tom, this doesnt seem right at all? What boost pressure are you seeing under load? Its very hard to diagnose from a distance but it sounds as though it is going to be one of the basics - ie not enough air, not enough fuel or not enough revs? When you serviced did you replace the air filter? Its no good looking at it and saying............its clean, my 90 has a MOD resriction gauge fitted and it showed me a blocked filter when it looked clean as a whistle?

It might sound obvious.......but when the pedal is to the metal - is the fuel pump to the stop? basic but makes a real difference!

What about the fuel? have you had someone follow and see if there is any hint of black smoke when its pulling hard? Is there any hint of vacuum in the tank after a run? has yours got the water trap between the tank and filter?

Also does it rev freer in the lower gears than in top?

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it is strange, its getting to the point where I am fed up of it and I don't find it a joy to drive. its boosting 15 psi under load, I understand this is the factory setting.

I replaced all filters, this one is clean and only 2 weeks. I have adjusted the slack n the cable so it does now hit the stop. fuel only fill up with shell, and no smoke what so ever, even at night when it is noticeable. never noticed a vacuum when filling up but that's not to say there couldn't be, no water trap or sediment filter.

yes it does rev but doesn't pull very fast. it will reach its top speed in 4th of 60mph , in 5th nope none of it. the bit that baffles me is why when revved hard the engine momentarily wants to stall when returning to idle, it does this whether sitting on the driver pulling up to a junction, to me the only thing it could be is fuel starvation and that would mean injection pump :(

thank you

tom

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If this is a tdi motor (as you say 15psi boost, 300?), I'd suspect the camshaft timing being a tooth out, with everything else being Ok. Not sure how you could check without stripping off the timing case. I think if it's a tooth retarded you'd get this sort of effect. I bought one and it was as you describe, and I thought it was terrible performance. When I came to change the belt, I discovered the reputable landrover specialist that sold it me having changed the belt was indeed special. Now it's like chalk and cheese. Note it's hard to see the marks properly unless you remove the radiator. Has the timing belt been changed recently?

Nigel

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Nigel I think you might be on to something there, the guy said it was changed less than 500 miles ago. so 1 tooth retarded n it was similar to this, hmmmm anyone got a walk through for me as ill do it one evening.

thank you

tom

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this may sound like a dumb suggestion,but have you checked your transfer box?the reason I ask is that when I broke my first one I got a cheap replacement and noticed a distinct lack of power like yourself.turned out I had bought a 1.66 ratio t/box...top speed 55-60mph,engine revving it's guts out...overtaken by fully loaded bin lorries etc...just a suggestion ;)

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Sorry, didn't realise it was a 200tdi (should have read the title!), and it's quite a lot of work to strip it, more than a 300. So I'd check everything else before embarking on that one. I don't know how you'd check cam timing on these motors unless you strip it or indeed if the correct figures are available to compare it with (if you have figures for the cam you can attach a protractor to the crank and measure it then compare it how it should be, though that itself would be quite fiddly).

Nigel

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