I have a 2001 L200 with about 50k miles on it and it has recently started sputtering when idling and getting smoky particularly on startup. The engine light sometimes comes on and I loose alot of power - presumably this is the engine protecting itself.
I took it to a main dealer hear in Auckland and they charged me NZ$800 for new glow plugs, they also claimed to have adjusted the waste gate neither of which have made any difference.
Has anybody else had these problems and if so what is the likely cause as I fear the garage will keep ramdomly changing expensive bits at my expense!
Thanks!

It also needs to be reprogrammed to handle the boost, problem with it that it suffers from overboost.

sounds like an injection pump fault but check with your dealer as there is an ecu rewrite available for the l200 to correct overboost issues which are very common and result in loss of power and/or excessive black smoke.the injection pump however I would go to your local diesel specialist as they may be able to diagnose a faulty pump easier and more accurately than the dealer.unfortunately the 4d56 diesel pump is not servicable due to the calibration chip on the top.if it is just a matter of adjusting pump timing than the specialist can do it

My first thought was that it was the EGR system because when it sputters on the idle allowing the revs to briefly fall before picking up again the EGR solenoid valve near the bulkhead buzzes and rattles. The solenoid is silent when engine is idling OK - Is this a red herring?
Does overboost affect idling and starting or only cause smoke when you put your foot down?

overboost is only a fault when hard throttle.at idle there is little boost.as fpr the egr possability, you may wish to try disconnecting the egr vaccuum line(if yours is vacuum controlled as some are electric) which should keep the vavle closed and try driving it for a bit.not using the egr just makes the vehicle not as emmission friendly and should still drive fine.it is an easy test to confirm your theory

Thanks for all the advice, I went back to mitsubishi and they disabled the EGR system and said that they too suspected an injector pump fault but to drive it for a while and see how it went. Anyway, the car was no diferent, it still had rough idling and poor starting.
So I took the car to a diesel turbo/injector specialist who were evry helpful. They checked lots of stuff, engine compression was OK, feeding fuel direct to the pump and the fault was still evident. They also corrected sticking injectors, checked the new glow plugs were getting power and fitted a new seal on the end of the pump.
After all this they finally concluded that it was a faulty governor in the injector pump and suggested replacing this. Incidentally, they have fixed the cold start problem so now I just have rough idling.
They say that fixing the pump will likely cost atleast NZ$2000 and they will have to send abroad for the part because it isn't the same as NZ models. I am now thinking that I should get Mitsubishi to quote for a whole new pump and see if this is a similar cost.
I pray that if I pay NZ$2000 for a new/fixed pump that this will fix the problem as I am beginning to think that I will never get to the end of this! Any Ideas?

if you go the dealer route DO NOT buy a reconditioned pump.they are very poor rebuilds(not the dealer fault but the supplier)most of the recon pumps we fitted were no good inside a year or in most cases within months.new pumps are more cash but worth it if youtr keeping the vehicle

I rang mitsubishi again to ask about fixing the pump and they said they would get a local specialist to do this - guess what, it was the same company I had already contacted an who had fixed my starting problem. So I went back to the diesel specialists and they said that, once they had the parts, they would be sending my pump to a company in Wellington for reconditioning/recalibration. I don't yet know what a new pump would cost but if its a lot more than $2000 then I'll be sat in the dark eating bread and water! Should I give this firm a crack at fixing my pump before I fork out for a new one? Or are you saying that this will likely give me problems in the future?

I can not say on the quality of the specialist that your local dealer uses.the faulty recon units I am refering to come from colt cars supplied to mitsubishi for distribution to the dealerships as needed.hopefully this person is better and that is why your dealer is using them.working in a dealership I am of course happier with the new units but I can appreviate money is a very key issue with people.might be worth comparing the costs of recon versus new as well as the warranty that comes with each.going to have yours reconditioned could be ok but no price can really be set for repairs until it is apart and then your committed to repair costs.a simple swap from yours to a new one can be done in 2hrs which is much less cost than sending away yours.not knowing the bill,not having wheels while it is done etc etc.If you could afford it I would do the new unit simply as it saves time,aggrevation and possably costs when all the factors are accounted for.hope all goes well

OK, I went back to Mitsubishi to give them the deposit they needed for the new pump and after looking again at the vehicle the new pump price increased to NZ$4300 +gst which is about 1750 UK Pounds and doesn't include fitting. Do you know if there is somewhere in the UK that I could source the pump and have it shipped to NZ? Even if I go for the recon it could cost NZ$3000 +gst depending on what's wrong and apparently it will have to go to Australia and I'd have to rent a car for the duration. Please, if anyone knows a cheaper way out of this mess please let me know. Otherwise I just drive it and cross my fingers.

pm me your vin(chassis)number and I can check with my old dealership as our l200 pumps are usually about £1000 for the uk spec ones.not sure what the import ones are going to cost but it never hurts to try.if you have the mitsubishi part number from your dealer then pm me that as well to compare prices for you.

I think I should have made it clearer that the car is a UK '4-life' model and was brought to NZ from the UK - this is why I suspect that the parts are hard to find here. The details from inside the engine bay are as follows:

Plate on Bulkhead (behind Engine):
VIN No: MMBJNK7402D024029
Other No's: 013F1010V

Plate Near Radiator:
Model: K74TGJENXFR6
Engine: 4D56 (MR577154) 1.70
Trans Axle: VSMT1 4875

Plate ontop of Injector Pump:
No: 479778-7221
Other Markings: DC5V 28227

I am extremely grateful for your assistance in this, I hope this is the correct information.