High Diesel consumption

[Kradmelder]

On a long trip I notice the fuel consumption of my 2.8 TDi Mitsubishi diesel has shot up. I got about 1000 km on more than 130 l. I used to get 11-12 l/100 km.

There is also a loss of top end power.

Diesel pump needs to be recalibrated or injector tips?

I doubt its compression. Only 75 000 km on it.

Wheel alignment cant cause such a serious drop in mileage?

I cant see smoking at idle and don't see big clouds of smoke in mirror.
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[Joncrete Cungle]

Pajero / Shogun? How old is it? As you dislike the cage is it sat round doing nothing a lot of the time? Does it have EGR valve / DPF?

[Kradmelder]

[G]

I don't know if it's similar, but on my Delica (also a 2.8td Mitsubishi) the fuel pump seal went and this was a common issue.

Initially it didn't cause a big problem, but as it got worse it also caused starting problems as something flooded.

[Joncrete Cungle]

From memory the African versions of 4x4 I have driven all had the EGR blanked off, where on a European model of the same year did have EGR.

[Kradmelder]

[uberkron]

It may be about to start running on its lube oil. Injection pumps didnt seem particularly long lived, turbos are pretty fragile too. I have had some bizarre faults on the l400, there is an electronic control module within some injection pumps, nothing goes physically wrong, just dry solder joints and bung capacitors. Sell it and buy a 20 year old toyota, it will give more economy and is cheaper/easier to repair.

75000km should be nothing to a diesel. I have friends with diesel toyotas that have passed 500,000km with original clutch, head and only adjustments to idle speed and injection volume. Theres a 90's pajero in the group, we use it to tow our boats, it is a shitter, no wastegate, lots of black smoke, being fed lpg. Someone paid 40 grand for it new!

Mitsubishi are known for implementing tech advances, such as gdi, but they become nightmares frequently before 100,000km. I have no bias, i earn money fixing any type of vehicle. I have heard more tales of woe from mitsu owners than even the owners of old alfas, fiats and other diabolical cars.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[G]

Checked for leaks in the turbo pipes?

Mine had one and that didn't help speed or economy.

[uberkron]

It may be about to start running on its lube oil. Injection pumps didnt seem particularly long lived, turbos are pretty fragile too. I have had some bizarre faults on the l400, there is an electronic control module within some injection pumps, nothing goes physically wrong, just dry solder joints and bung capacitors. Sell it and buy a 20 year old toyota, it will give more economy and is cheaper/easier to repair.

75000km should be nothing to a diesel. I have friends with diesel toyotas that have passed 500,000km with original clutch, head and only adjustments to idle speed and injection volume. Theres a 90's pajero in the group, we use it to tow our boats, it is a shitter, no wastegate, lots of black smoke, being fed lpg. Someone paid 40 grand for it new!

Mitsubishi are known for implementing tech advances, such as gdi, but they become nightmares frequently before 100,000km. I have no bias, i earn money fixing any type of vehicle. I have heard more tales of woe from mitsu owners than even the owners of old alfas, fiats and other diabolical cars.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[delvey91]

Should of bought a nissan hardbody !!
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2016 Honda Africa Twin
2006 KTM 200 EXC

[bezzabsa]

Change l the oil,air and diesel filters...sounds like its in need of them..

[Kradmelder]

All my filters done regular.


Uberkron is a bundle of good news. Fark me. Total ultimate uberpessimist! Lol!
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[Ariel Badger]

Indigenous with a syphon?
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Bikers make great organ donors, get 115 on your licence today.

[AlanC]

[uberkron]

Sorry to be the bearer of bad news.

I had a 2wd 2.5td mitsi van for a year, i thought it was thirsty. I averaged 350 km per 50 litres of diesel. It was only ever lightly loaded with 250kg of cargo, and once it had roof racks fitted it went to 290km per 50litres. It didnt matter whether it was town or motorway driving.

Oil consumption was like a two stroke, half a liter of oil per tank of fuel.
This van was leased originally for three years but was given back early once replaced with a hiace.

If anybody has had a good run with a sub three litre mitsi diesel im all ears.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[Kradmelder]

I used to get 11 l per 100 km on it, or 9 km per litre. So it wasn't so bad.

Now I'm down closer to 7.

Checked the oil before I left. Was fine. I never need to add any between services

This trip I ran it about 60 km in 4x4. That may explain some. But its heavy all the time now and doesn't have top end power
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[Kradmelder]

Could also be the timing on the diesel pump?
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[FirebladeRuss]

Have a diagnostic done on it.

I'd guess at the AFM being knackered (air flow meter).

If the AFM's either not working at all or not workign properly, your fuel consumption will increase and your power will decrease - which sounds to me the issues you have.
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Twitter is for people who can't STFU even when they're by themselves

[bikenut]

:D i know of one mitsubishi diesel eng which was poor starter and low on power ( misfire ) and using oil, with low mileage ( less that 80k miles )

turn out to be a manufacturing fault,

poor cyl ( massive wear on that cyl, all others all ok ) conrod not drilled for lubing thrust side........

they eventually paid the warranty claim after lots and lots of letters and legal stuff!!!!

[stevo as b4]

Seeing as it used to be better on fuel and have more power, i'd certainely be looking at all the charge air pipework and the IC for splits or leaks. If it's not smoking, then the turbo is not likely to be knackered, but pull off the turbo inlet hose and check for signs of oil and for any damage to the compressor wheel etc.

Is the wastegate working ok, and is there any way you can rig up a temporary boost gauge to see if your getting the factory boost pressure?

Is the fuel pump an electronically controlled rotary pump, or does it have common rail or individual pump/injector units like the VW PD engine etc?

It might be worth having the injectors out for testing and to have them cleaned and the spray pattern checked as well.

Lastly I assume the intake pipework is not kinked or obstructed in any way before the turbo and the filter is clean and correctly fitted?

If it has a Cat, then again it's a possibility that theres a blockage or obstruction to exhaust flow, even a collapsed baffle in a silencer could increase back pressure to a level where the engine is strangled thus losing you power and mpg.

Being a diesel, I can't really see it being anything else than one or some of the above points, with turbo damage or wear as a slim outside possibility.

I take it that there's no mechanical drag like sticking brakes or being low on gearbox or diff oil etc?

Hope you get it sorted soon anyhow!

[uberkron]

You can change pump timing plus/minus ten degrees, the whole pump rotates on three or four bolts. Is your pump the three or five wire model?
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[Kradmelder]

Thanks guys. That is plenty to go on! Quite a few things I didn't consider.

Now for the inevitable process of elimination
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[Kradmelder]

Got the problem. The injectors. they were sent to be tested. The diesel isn't atomising. a set of 4 reconditioned injectors R2200. £160.
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2011 KTM 990 Dakar
2009 BMW 1200 GS

[stevo as b4]

Good news, sorted for £160!

Make sure you do some thorough high speed road testing after to make sure you getting your top end speed back too!

[Kradmelder]