Pajero 4WD Club of Victoria Public Forum Pajero 4WD Club of Victoria Public Forum

Go Back   Pajero 4WD Club of Victoria Public Forum > Vehicles > Generation 4-1 Pajero

Generation 4-1 Pajero NS Model 2006 - 2009

Reply
 
Thread Tools Display Modes
  #1  
Old 29-02-12
justcruizin justcruizin is offline
Valued Member
 
Join Date: Jun 2008
Location: Brisbane
Posts: 481
Send a message via MSN to justcruizin
Default DPF Solution ???

I know there is thread on this topic but it is so long, I dont have the time to troll through 80 odd pages. My questions are........ was there a definative fix to the DPF problem by MM? Was it sorted through software updates or other methods?

I have had the inlet manifold issue, so was wondering if there is anyway the DPF can stuff up a perfectly good trip Fraser Is later this year. A bit paranoid about the car going into limp mode if the DPF gives up the ghost whilst on the island. Any feedback would be much appreciated.

Cheers, Mick
__________________
08 NS 25th Anniversary Limited Edition DID Auto, MM TBar, TJM T13 Bar, Airtec Snorkel, Redarc Dual battery, ORU 12000lb rope winch, Bushskinz Full Bash Plate set, Uniden UHF, Narva 175 spots, HD(F) & SD(R) Lovells, Bilsteins, Dynapro ATs, Diff and trans breathers, Poly Airs, Ridge Rider Awning, Eagle Camper Trailer, Engel 40 lt, Waeco CF110
Reply With Quote
  #2  
Old 29-02-12
psproule's Avatar
psproule psproule is offline
Valued Member
 
Join Date: Jun 2007
Location: Googong, NSW
Posts: 3,654
Default

Fixed by the software update. But they can occasionally / eventually still go into limp if it is constantly driven on short trips and thus never completes a burn-off. It's not just Pajeros that do it either.

For the absolute definitive fix - fit a delete pipe.
__________________
16 Mitsu NX Pajero GLX
10 Ford LV Focus ST / XR5
Reply With Quote
  #3  
Old 29-02-12
Merts's Avatar
Merts Merts is offline
Valued Member
 
Join Date: Nov 2011
Location: Bendigo Vic
Posts: 1,404
Default

G'day Mick,

My NS has had all the software updates. It was still fairly regularly having the DPF light coming on, and I would have to go for a half hour drive to regen the DPF (I do a lot of short trips as my house is only 5 minutes drive from my office). I would have concerns about driving one around on Fraser and not being able to drive fast enough for long enough to get the regen to work.

Fitting a delete pipe is really the only way to eliminate the potential problems.

There are other benefits that go with it such as improved power and economy, and no need to use the low ash engine oil any more.
__________________
Merts
Impulse Blue 2015 MQ Triton GLS Auto

ARB Summit front & rear bars and side steps, Carryboy canopy and rack, Safari Snorkel, VRS 9500 winch, Gecko 16x7 rims with BFG 245/75r16 KM3s, Uniden 8080s UHF, Darche 270 awning
Dobinson heavy duty suspension, Harrop rear Elocker, Supertrim Neoprene Seat Covers, Drifta drawers, MSA drop slide, dual battery system and ARB onboard compressor. National Campers Hermit.

Previously a Gunmetal 2007 NS VRX DiD Auto
Reply With Quote
  #4  
Old 29-02-12
AndyA AndyA is offline
Junior Member
 
Join Date: Feb 2012
Location: Perth
Posts: 7
Question

Hi Mick,

Can't help but can share our experiance as I am going through my own nightmare at present. After several limp home episodes decided to get rid of the unspeakable unit (after MM declared the unit knackered) with a cat (to create back pressure) under advice from the local exhaust specialist. Worked well for a month or so, hooked on the caravan and bang dpf light and limp home again. Looking at options from here but looks like a difficult task to fool the ECU. Manta can provide a 3 inch exhaust with 2 x cats for the NS however the sensors will still need to be installed and if it isn't fooled now I can't see much difference after installing an expensive exhaust.

Andy
Reply With Quote
  #5  
Old 01-03-12
jawk jawk is offline
Valued Member
 
Join Date: Feb 2009
Location: Australia
Posts: 542
Default

Quote:
Originally Posted by AndyA View Post
Hi Mick,

Can't help but can share our experiance as I am going through my own nightmare at present. After several limp home episodes decided to get rid of the unspeakable unit (after MM declared the unit knackered) with a cat (to create back pressure) under advice from the local exhaust specialist. Worked well for a month or so, hooked on the caravan and bang dpf light and limp home again. Looking at options from here but looks like a difficult task to fool the ECU. Manta can provide a 3 inch exhaust with 2 x cats for the NS however the sensors will still need to be installed and if it isn't fooled now I can't see much difference after installing an expensive exhaust.

Andy
Andy your experience seems odd.
The ECU fix from MMA cant be called a definitive fix - as it can still throw you into limp home.
Delete pipe is the only fix. But, the pressure pipes and sensor have to be dealt with. Otherwise the ECU will crack the shytes.

The sensors (2 x pressure pipes, 1 x temp) need to be put back in the line in approx same place they came from - or loop the pressure pipes together and just have the temp sensor in the pipe.
Reply With Quote
  #6  
Old 01-03-12
Merts's Avatar
Merts Merts is offline
Valued Member
 
Join Date: Nov 2011
Location: Bendigo Vic
Posts: 1,404
Default

Quote:
Originally Posted by AndyA View Post
Hi Mick,

Can't help but can share our experiance as I am going through my own nightmare at present. After several limp home episodes decided to get rid of the unspeakable unit (after MM declared the unit knackered) with a cat (to create back pressure) under advice from the local exhaust specialist. Worked well for a month or so, hooked on the caravan and bang dpf light and limp home again. Looking at options from here but looks like a difficult task to fool the ECU. Manta can provide a 3 inch exhaust with 2 x cats for the NS however the sensors will still need to be installed and if it isn't fooled now I can't see much difference after installing an expensive exhaust.

Andy
If the pressure sensor pipes have been reconnected before and after the new cat, that is probably your problem. The engine management system programs a burn-off when there is a preset difference in pressure between the two sensors. As the DPF blocks up, the pressure in the exhaust system before the DPF increases. The resistance through the second cat is probably causing enough pressure difference to trigger a burn-off.

As Jawk mentioned, you would be better of just linking the two pressure sensor pipes together in a loop rather than connecting them to the system either side of the cat.

It doesn't matter if they are connected to each end of the DPF delete pipe as it is straight through without any restriction (so no pressure build up).

Andy, if I was you I would try looping the two pressure sensor pipes to each other and block the ports on the exhaust. That should stop any burn-offs from being triggered.
__________________
Merts
Impulse Blue 2015 MQ Triton GLS Auto

ARB Summit front & rear bars and side steps, Carryboy canopy and rack, Safari Snorkel, VRS 9500 winch, Gecko 16x7 rims with BFG 245/75r16 KM3s, Uniden 8080s UHF, Darche 270 awning
Dobinson heavy duty suspension, Harrop rear Elocker, Supertrim Neoprene Seat Covers, Drifta drawers, MSA drop slide, dual battery system and ARB onboard compressor. National Campers Hermit.

Previously a Gunmetal 2007 NS VRX DiD Auto
Reply With Quote
  #7  
Old 01-03-12
justcruizin justcruizin is offline
Valued Member
 
Join Date: Jun 2008
Location: Brisbane
Posts: 481
Send a message via MSN to justcruizin
Default

Thanks for the replies. I am lucky that i have a second runabout car for the short trips and I save the paj for the longer journeys. Looks like a delete pipe is the way to go however as i am still under warranty, will a delete pipe create issues from a warranty perspective?
__________________
08 NS 25th Anniversary Limited Edition DID Auto, MM TBar, TJM T13 Bar, Airtec Snorkel, Redarc Dual battery, ORU 12000lb rope winch, Bushskinz Full Bash Plate set, Uniden UHF, Narva 175 spots, HD(F) & SD(R) Lovells, Bilsteins, Dynapro ATs, Diff and trans breathers, Poly Airs, Ridge Rider Awning, Eagle Camper Trailer, Engel 40 lt, Waeco CF110
Reply With Quote
  #8  
Old 01-03-12
Wrex's Avatar
Wrex Wrex is offline
Valued Member
 
Join Date: Aug 2007
Location: Perth
Posts: 789
Default

30min work max and the dpf is back on
Reply With Quote
  #9  
Old 02-03-12
AndyA AndyA is offline
Junior Member
 
Join Date: Feb 2012
Location: Perth
Posts: 7
Default

Quote:
Originally Posted by jawk View Post
Andy your experience seems odd.
The ECU fix from MMA cant be called a definitive fix - as it can still throw you into limp home.
Delete pipe is the only fix. But, the pressure pipes and sensor have to be dealt with. Otherwise the ECU will crack the shytes.

The sensors (2 x pressure pipes, 1 x temp) need to be put back in the line in approx same place they came from - or loop the pressure pipes together and just have the temp sensor in the pipe.
Thanks gents

The cat we installed replaced the dpf (same location) and the sensors are all still attached. What is the theory behind disconnecting the pressure pipes and connecting them together? Would the ecu not require there to have a pressure difference between the sensors?
Reply With Quote
  #10  
Old 02-03-12
Wrex's Avatar
Wrex Wrex is offline
Valued Member
 
Join Date: Aug 2007
Location: Perth
Posts: 789
Default

Because they are joined there is no pressure difference the ECU likes this.

I would suggest the pressure difference in your 2nd cat is in a range the ECU doesn't like.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
My DPF delete pipe Wrex Generation 4-1 Pajero 49 29-01-13 03:29 PM
DPF or no DPF? THT Generation 4-2 Pajero 19 26-08-12 10:39 PM
DPF Enquirey Fox Shooter Generation 4-1 Pajero 24 17-06-08 05:20 PM
My new Paj is broke and some more impressions Rich Generation 4-1 Pajero 15 02-10-07 04:25 PM


All times are GMT +10. The time now is 10:38 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.