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Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
So with the huge fuel increase tomorrow I made some time and got to work on advancing my diesel pump to try and get my consumption down from about 14l/100km.

I have eliminated all other aspects of the car. Compression test checked out fine, EGR delete, almost Freeflow exhaust, intake cleaned, throttle body cleaned, boost checks out, tyre pressures, alignment etc.

This will be my feedback as of today whether it gives better economy or not.

I made a mark on the pump by one of the 3 holding bolts and turned the top of the pump towards the engine to advance. My mark moved about 3mm-4mm. It is currently at the most advanced spot. It can't go any further anyway due to the pump slots not allowing any further movement.

It now starts with one swing less and my smoky idle is now completely gone, where it sometimes would just have the faintest trace of some smoke out the back. A blip of the throttle also doesn't produce an instant smoke plume now like it used to. The exhaust doesn't burn my eyes as much as it used to when bending close to it as well.

It sounds more agricultural (like the isuzu 280DT but not as harsh - actually a beautiful diesel sound) and to my ear identical to the other pajeros I hear in town.

I took it for a short spin and the tail wagged sideways on one of my favourite gravel bends in second gear 2H, where it used to stick in 1st 2H. Not bad considering it's an auto.

The tank is now empty and I'll fill up tonight.

To today's date my consumption on the car is 14.1l/100km stretching over nearly 17'000km of logged economy on fuelly.

You can track my progress on fuelly

http://www.fuelly.com/driver/4epikanini/pajero

And this is my current consumption that will change over time if this pump advance has helped me.

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Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
Drove on the highway just now. It pulls very very strong now.

Filled up so will report back.

Torque converter stays locked up for longer as well
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Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
I am a bit surprised at the consumption 14l/ 100 translates to about 7.2 km/l :shock: I was under the impression that the diesel babies got much better than that,so much so that I am in the process of obtaining a shortie diesel. Maybe I should just buy petrol for the extra cash needed to get the shortie.

My Situation is so that I need to get up to Kruger every full moon and with the new fuel price it is hectic. Getting a smaller commute is not an option as I go off road and need a decent and reliable 4x4 and that does not mean a suzuki :twisted: At present I get about 7.6 km/l if I stick to the speed limit and a little more if I drop to 100 and as an added bonus I still have th roar of a v6 to intimidate a boisterous ellie
Henk Bannink

Some people are wise, some people are otherwise
Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
Henk

I must admit that your train of thought has merrit. My 3.2Diesel Fuelly statistics also currently show consumption of around 14.4l/100km which is horrendous and also similar to 4EPikanini's consumption, but must be seen in context first:

1. I run slightly bigger tyres which has an effect on consumption due to increased rolling resistance.
2. I measure my consumption from actual GPS mileage and not the optimistic speedometer in vehicle.
3. I always have roofrack mounted.
4. I carry about an estimated 200-300kg extra weight around from standard vehicles due to winch, 3x extra batteries, full longrange tank, solid rocksliders, steel rear bumber, various crap in the third row seat well.
5. My consumption is based on a daily commute to office for 9km which takes me about 30minutes with traffic.
6. When I do travel open road I have the Xplorer(all 1.8tons of it) hooked on the rear and I travel at around 100-120km/h with it.
7. Due to kids I more often than not have the rear aircon on(this makes a marked diff in consumption for some reason)
8. When going away I often use 4x4 high and low which also eats juice.

I have not tinkered with EGR blanking, 2SO, etc like Marius so mine is pretty much standard on the engine side except for snorkel fitment.

I will be following 4E's report back with interest as I think both his and my vehicle are currently using more diesel than it should, even with taking the above into consideration. Some years ago I often got 12l/100km and lower as consumption which I have not seen even close on my recent consumption records, so something must be wrong?

My vehicle will be going to the agents for its next service and also to Alan Black or similar to have the injectors replaced and pump checked and calibrated. I suspect that is my problem but it is a costly repair, so 4E's results will also be watched with GREAT interest.

CATS
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
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Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
I don't run any extras other than spotlights, and a massive bashplate which should off set itself in improved aerodynamics as it goes all the way from the front crossmember (where the lower control arms attach) to the rear crossmember (where the gearbox mountings are).

I run standard size A/T tyres usually between 1.8-2.0 bar.

I rarely exceed 120km/h and cruise mostly at 100-110km/h.

I do about 50% open road, (To get to town is 4km gravel where I hardly touch the brakes and then 6km highway) so my car gets up to operating temp all the time and East London hardly has traffic jams (if there are I avoid driving those times - I luckily work from home so only go to town when needed)

So, my 14l/100km is fairly high. Even when travelling to the Northern Cape to visit Shalene's dad, I still get 12.8-13.5l/100km when travelling highway at 110km/h and below.

I fell confident my pump advance will work as it now feels very peppy at highway speeds. It used to start being lazy from 100-120 and very lazy from 120-140.

Now it just pulls through without thinking of being lazy.

I am trying now to drive like I always do to get accurate results.

At best my fuel gauge was halfway at 300km so I'll see where it is this time round. If this advance does what I hope it will and gives me close to 10-10.5l/100km then I should see 400km or more at the halfway mark.
Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
I also run standard size tyres, told NY wide to check every week that it is 2.5 bar, see if it wont make a difference.

She filled up last night and it was also half and showed 297km. It worked out to 7.3km/l.

I've done the egr blank, clean intercooler, new injectors, cat has been removed, etc. It had 210k km on now.

Also watching this thread closely!

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2009 Pajero 3.2 LWB GLX
OME Suspension
ARB Bumper
FR Roof Rack
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Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
We can only hope.

I can't find any reference on the web of someone doing something like this on the 4m41 so I'm in unchartered territory.

Let's hope it goes well.
Transkeicowboy
Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
hope you have found it. interesting that she is now performing with more vooma. i must go for a drive with you some time and see how your pajero compares to how mine used to perform
GertM
Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
Did'nt the okes advanced the pump on their older Isuzu 280's to get a better performance as well? IIRC you mus'nt overdo this as it will shorten the life of certain components and all this will come to nothing. Someone also told me that the pump timing is a bit retarded in the factory so as not to over rev the engine. We will wait for the outcome of the 4E experiment.

Last week I went to the N Cape and on my way there I got 11.4 km/l (I think there was a little tailwind) and on my way back I got 10 km/l. I always travel at just over 120 km/h on the speedo (117 on the GPS) as the TC is then locked. In town my consumption varies between 7.5 and 8.2 km/l.
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Re: Pump Advance - 2001 Pajero 3.2 Di-D - Feedback
GJM wrote:Did'nt the okes advanced the pump on their older Isuzu 280's to get a better performance as well? IIRC you mus'nt overdo this as it will shorten the life of certain components and all this will come to nothing. Someone also told me that the pump timing is a bit retarded in the factory so as not to over rev the engine. We will wait for the outcome of the 4E experiment.

Last week I went to the N Cape and on my way there I got 11.4 km/l (I think there was a little tailwind) and on my way back I got 10 km/l. I always travel at just over 120 km/h on the speedo (117 on the GPS) as the TC is then locked. In town my consumption varies between 7.5 and 8.2 km/l.
Thats the figures im looking for.

In all honesty i think the advance was only 2mm or so. It is tiny.

The wear in the pump and the possible wrong install by a previous mechie may just bring the pump up to spec with the advance. The engine sounds healthy and idles smooth with no smoke when idling or revving. I cant wait to do some miles and see the results.

An old speed sensor on the pump may also have a slight delay which results in effective retard of the injection pulse.

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