Many Series 2 and 3 (June 2006 – Aug 2010) D40 Diesel Auto owners are unhappy with their vehicle’s fuel economy. Most put this down to the diesel particulate filter (DPF) installed in the exhaust on the passenger side. There are many threads either explaining how the DPF works (or does not work as the case may be) and problems with it including poor fuel economy and the DPF blocking up causing the vehicle to go into limp mode.
These include (amongst many others):
·
Furthermore, vehicles fitted with a DPF are also required to use ACEA C3 (Low Ash) 5W 30 oil to reduce the particulate output. This oil is more expensive and adds further costs. Failure to use the correct oil is also a significant cause of DPF failures.
So given my determined nature, I went on what turned out to be a seven month crusade to remove the DPF and the OEM dump and cat. Of course I had lots of help and suggestions from forum members and others along the way. Here are my results in one single thread with all the photos you’ll need to get the job done (and some storytelling to keep it interesting)...
I first found a custom made DPF delete pipe on eBay back in March 2010 so I copied the text and more importantly the photos for use at a later date:
I then knew that deleting the DPF could in fact be done but was still a little unsure so continued investigating. I approached an exhaust shop who had done some great work exhaust work to my previous two utes but they had never seen a DPF and were not keen to remove it nor fabricate a delete pipe.
This caused further delays but in the end I approached Mark from Exhaust Technology showed him the pictures in July. He jumped at the opportunity to experiment on someone’s car and with photos to look at the decision was made. I deleted my DPF in early July 2010.
Here is the DPF:
I carefully recorded fuel consumption over the next two weeks and I was rewarded with a great result. My fuel consumption dropped from 15.5L / 100kms to 14.5. I would be first to concede that both figures are high but my D40 tares in at 2472kgs and I drive it hard. I drove it for another week and topped the tank up and my initial fuel economy results were repeated. I honestly could not notice any performance response from fitting the delete pipe.
Accordingly, you can safely remove a DPF without triggering the Check Engine Light (CEL) and according to my figures you can expect to drop up to 1L/100kms. Importantly all the sensors must be plugged back into the delete pipe approximately where they were removed.
Here is my custom made Delete Pipe. Chip It sell delete pipes for those wanting an off-the-shelf solution to replacing their DPF.
These include (amongst many others):
·
- · http://www.navara.asia/d40-general-chat/4122-dpf.html
- · http://www.navara.asia/d40-engine/1748-dpf-sensor.html
- · http://www.navara.asia/d40-engine/2536-exhaust-mod-dpf.html
- · http://www.navara.asia/d40-engine/4268-dpf-new-stx.html
- · http://www.navara.asia/d40-engine/964-diesel-particle-filter-break-down.html
- [FONT="]http://www.navara.asia/d40-general-chat/4096-d40-auto-fuel-economy.html[/FONT]
- · http://www.navara.asia/d40-general-chat/39-d40-fuel-economy.html
- · http://www.navara.asia/d40-engine/4254-navara-2010-2-5-diesel-fuel-consumption.html
Furthermore, vehicles fitted with a DPF are also required to use ACEA C3 (Low Ash) 5W 30 oil to reduce the particulate output. This oil is more expensive and adds further costs. Failure to use the correct oil is also a significant cause of DPF failures.
So given my determined nature, I went on what turned out to be a seven month crusade to remove the DPF and the OEM dump and cat. Of course I had lots of help and suggestions from forum members and others along the way. Here are my results in one single thread with all the photos you’ll need to get the job done (and some storytelling to keep it interesting)...
I first found a custom made DPF delete pipe on eBay back in March 2010 so I copied the text and more importantly the photos for use at a later date:
[FONT="]"D40 NAVARA DPF FILTER REPLACEMENT PIPE.[/FONT]
[FONT="]BETTER FUEL ECO.[/FONT]
[FONT="]NO MORE TURBO LAG.[/FONT]
[FONT="]I GOT ABOUT 20% MORE POWER.[/FONT]
[FONT="]THIS ITEM TOOK A WHILE TO FIND SOMEONE TO MAKE.[/FONT]
[FONT="]ONLY SELLING DUE TO CAR BEING SOLD AND I KNOW WHAT AUTO DEISEL NAVARA'S ARE LIKE ON FUEL.[/FONT]
[FONT="]IT WORKED ON MY NAVARA IT MIGHT WORK ON YOURS.[/FONT]
[FONT="]FORGOT TO MENTION THAT ALL THE SENSORS CAN BE PLUMBED IN THATS THE REASON FOR THE PRICE.[/FONT]
[FONT="]IF YOU DONT PLUMB THEM IN A ENGINE CHECK LIGHT WILL COME ON.[/FONT]
[FONT="]$550"[/FONT]
I then knew that deleting the DPF could in fact be done but was still a little unsure so continued investigating. I approached an exhaust shop who had done some great work exhaust work to my previous two utes but they had never seen a DPF and were not keen to remove it nor fabricate a delete pipe.
This caused further delays but in the end I approached Mark from Exhaust Technology showed him the pictures in July. He jumped at the opportunity to experiment on someone’s car and with photos to look at the decision was made. I deleted my DPF in early July 2010.
Here is the DPF:
I carefully recorded fuel consumption over the next two weeks and I was rewarded with a great result. My fuel consumption dropped from 15.5L / 100kms to 14.5. I would be first to concede that both figures are high but my D40 tares in at 2472kgs and I drive it hard. I drove it for another week and topped the tank up and my initial fuel economy results were repeated. I honestly could not notice any performance response from fitting the delete pipe.
Accordingly, you can safely remove a DPF without triggering the Check Engine Light (CEL) and according to my figures you can expect to drop up to 1L/100kms. Importantly all the sensors must be plugged back into the delete pipe approximately where they were removed.
Here is my custom made Delete Pipe. Chip It sell delete pipes for those wanting an off-the-shelf solution to replacing their DPF.
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( Still rainning!!!) so went around to jase's shop and played around with the car. Showed jase the spacer on here (like bosshogs) and made one 
Just another point im thinking about is that half of my driving is around town (50 to 60 KPH) picking up material and gear for jobs as well towing a tonne trailer. So just wondering if you do about he same sort of thing bosshog ???
GGGGRRRRRRRRRRR!!!
NOT HAPPY!!!!!!!!
