Failed Emissions

Its remotely possible that the injector pump is putting in too much fuel. I'm not an expert on Land Rovers (yet). If your injector pump has an ancillary device called "negative torque control", the spring under the diaphragm in it could be weak - allowing too much fuel for the turbo pressure. Perhaps the spring could be tightened maybe a quarter of a turn, but I am not sure how easy it would be to do this or whether it would solve the problem. The problem could also be worn injectors.

I found this document on the net that might be useful for technical info:
http://www.forsdesign.com/LandRover/BoschFuelInjectionPumpTypeVE2.pdf. Its about 5MB so you might want to save it to disk before opening it.

Problem could be "blow by" from worn piston rings, or possibly valve seals, or a marginal head gasket. The "blow by" would go through the PCV and into the induction system thereby oil getting burned in the cylinders. The piston rings might be determined by a compression check if they are bad enough, but this is not always the case. On a diesel, the rings should easily last over 200,000 miles if the oil is changed regularly and the engine not overheated.

Diagnosis can be difficult with some of these problems and you definitely want the correct diagnosis before you start shelling out dosh for something that would not fix the problem.

Good Luck!

sounds like the bloke at the garage is trying to generate some work for himself!!!

For the past two years I have taken my 90 to to seperate MOT garages that ONLY do MOTs... My emissions have never been checked!!! Stay away from garages that offer to do MOT repair work as they just make work for themselves... like printing money!!!


Dave White

www.sadlrc.co.uk

Yeah thanks for all the info, it's pretty much what other people have said but a bit more useful. Thats the problem - diagnosing it before i start changing this and that!

The garage i took it to, which we have used for years, only does MOT's & buys and sells classic cars.

Thanks again!

You have had a good number of things to try now we are on page 3 ! I regularly see diesel vans and cars putting out a good bit of smoke, I dont mean a swirl of smoke as some TDCI takes off down the road but a labouring transit on a slight slope type of situation putting out enough smoke so you want to overtake it. Anyway when you drive about position your nearside door mirror to see the exhaust pipe and tell us how bad it is as you drive.

When I accelerate my 2.5TD through the gears I can see a little black smoke but it disappears as soon as I lift slightly, no way is it embarassing but it is more than my 406HDI. On a light throttle I have a slight blue haze until the engine is right up to temp.

So do you fill the road with smoke or what?

Not when it up to temp.