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 3 Pajero

Generation 3 Pajero NM - NP Models 2000 - 2006

Reply
 
Thread Tools Display Modes
  #1  
Old 1 Week Ago
Steve Cox Steve Cox is offline
Junior Member
 
Join Date: Nov 2009
Posts: 8
Default Diesel air intake sensor clean

After owning this Pajero for about 6 years we are now finally heading off on a trip for a month into the outback. I'm towing a camper trailer and will be doing some sand driving so want all the power/economy I can get.
While talking to a mate he suggested that cleaning the air intake sensor with a special pressure pack can from Supacheap would perhaps give it a boost as it does get some really fine dust in there over time.
Had a look on the forum looking for this and could only find stuff for the gen 4 diesel motor. Was wondering if it is possible with the Gen 3 and if so has it been covered before on here. Cheers Steve
Reply With Quote
  #2  
Old 1 Week Ago
Steve Cox Steve Cox is offline
Junior Member
 
Join Date: Nov 2009
Posts: 8
Default

PS did block my EGR off when I first got the car, don't know if this makes any difference or not, cheers Steve
Reply With Quote
  #3  
Old 1 Week Ago
Kingbrown Kingbrown is offline
Valued Member
 
Join Date: Apr 2012
Location: Port Augusta - SA
Posts: 833
Default

Steve,

Look for CRC MAF cleaner (spray can).

As mentioned here before, the delicate sensor elements are deep within the black tube. On no account should anything be poked in there, except for the cleaning spray.

The amber coloured bulb that's outside of the black tube is the inlet air temperature sensor and that should be cleaned with the same spray.

Edit: Just read that Gen 3 doesn't have a MAF, so I retract the above.

Last edited by Kingbrown; 1 Week Ago at 05:12 PM. Reason: Gen 3 apparently doesn't have a MAF sensor.
Reply With Quote
  #4  
Old 1 Week Ago
Steve Cox Steve Cox is offline
Junior Member
 
Join Date: Nov 2009
Posts: 8
Default

Thanks for the prompt reply Kingbrown. When you say that the Gen 3 doesn't have a MAF sensor does that mean that there is no sensor at all to be cleaned? If so that could be why I'm not able to find anything on them. Hopefully someone can fill me in, cheers Steve
Reply With Quote
  #5  
Old 1 Week Ago
fikse's Avatar
fikse fikse is offline
Member
 
Join Date: Oct 2016
Location: Norway
Posts: 85
Default

Please don't destroy your MAF by cleaning it! Mitsubishi, amongst some others use the heated tread, Karman-Vortex sensor. They should never need a cleaning.
http://knowhow.napaonline.com/know-h...ur-maf-sensor/
__________________
Duct tape is like the force - it has a light side and a dark side and it holds the universe together.
My introduction.
Reply With Quote
  #6  
Old 1 Week Ago
Kingbrown Kingbrown is offline
Valued Member
 
Join Date: Apr 2012
Location: Port Augusta - SA
Posts: 833
Default

Thanks for the alert Fiske.

I do wonder though, whether a Karman Vortex sensor is used on the DiD motor.
References I've seen all relate to petrol motors where the Air Flow Metering device incorporates a homecomb structure to streamline the airflow upstream of the measuring elements. Sensing in that case uses optical or acoustic principles to measure the vortices in the airstream.

A picture of the OP's MAF sensor would help to establish what type he has.
Reply With Quote
  #7  
Old 1 Week Ago
fikse's Avatar
fikse fikse is offline
Member
 
Join Date: Oct 2016
Location: Norway
Posts: 85
Default

Quote:
Originally Posted by Kingbrown View Post
Thanks for the alert Fiske.

I do wonder though, whether a Karman Vortex sensor is used on the DiD motor.
References I've seen all relate to petrol motors where the Air Flow Metering device incorporates a homecomb structure to streamline the airflow upstream of the measuring elements. Sensing in that case uses optical or acoustic principles to measure the vortices in the airstream.

A picture of the OP's MAF sensor would help to establish what type he has.

AFAIK, but I can be wrong of course, Mitsubishi use Karman on all their engines. On my '06 4M41 / 3.2 DiD it is Karman for sure :-)
__________________
Duct tape is like the force - it has a light side and a dark side and it holds the universe together.
My introduction.
Reply With Quote
  #8  
Old 1 Week Ago
erad erad is offline
Valued Member
 
Join Date: Mar 2015
Location: Cooma NSW
Posts: 1,864
Default

The honeycomb structure in the petrol models is there to give some turbulence to the incoming air, particularly at low air flows. This is to allow the airflow meter to give a more accurate reading. I had a LPG powered NL Pajero, and some crappy HT leads caused severe backfires, which
(a) Caused the honeycomb to collapse, particularly when the air cleaner cover was lifted off the base and then came down on the honeycomb material; and
(b) Caused the loss of a piece of the honeycomb material when it fell out on the road somewhere.

I managed to panelbeat the honeycomb material back roughly to dimensions and shape, but the missing piece I could not replace, so I made up a perforated plate to try to simulate the losses caused by the missing honeycomb. This seemed to work OK, because it ran very well on both LPG and petrol. I did this mod because a supplier in Melbourne told me that there were lots of Pajeros running around with no honeycomb at all. I wanted to get the system back as close as possible to the original design.

I don't know what the arrangement of the diesel airflow meter is, but I will check it soon with my NW diesel. Whatever if it has a hot wire sensor, I will be very careful not to touch it. I will try to clean it with some spray, but certainly will not physically touch it.
Reply With Quote
  #9  
Old 6 Days Ago
psproule's Avatar
psproule psproule is offline
Valued Member
 
Join Date: Jun 2007
Location: Googong, NSW
Posts: 3,577
Default

Per before, the gen 3 DID does not have a MAF. It runs a MAP, mounted on the firewall behind the intake and fed via a short thin hose. This sensor should be left alone. On high mileage examples with EGR enabled, the port into the manifold might get restricted, but this was more of a problem in the NS pre manifold recall.

Pat
__________________
16 NX GLX blank canvas!
SOLD - 06 NP GLX DID with additional toys.
06 Alfa Romeo 156 JTS Selespeed (new toy!)
01 Alfa Romeo 156 TS Selespeed (there is a pattern emerging here!)
www.youtube.com/psproule
Reply With Quote
  #10  
Old 6 Days Ago
Steve Cox Steve Cox is offline
Junior Member
 
Join Date: Nov 2009
Posts: 8
Default

Thanks for that Pat, looked on youtube as well and can't find anything for my model/motor so was starting to draw to that conclusion. All running fine, so the old saying "If it ain't broke, don't fix it" comes to mind. Thanks to one and all again, cheers Steve
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
Intake manifold / EGR clean pajero-vrx Mechanical 14 16-12-16 03:01 PM
Intake Manifold clean- now how should I clean the ports in the head? m_and_m Mechanical 4 28-08-16 05:58 PM
Intake Manifold Clean Meremale Generation 3 Pajero 11 02-06-16 12:10 PM
Intake Manifold Clean Advice Wileyfox Generation 4-1 Pajero 3 18-07-15 04:03 PM
How to properly Clean rocker covers + intake manifold ?? yaka Generation 2 Pajero 2 17-08-11 04:52 AM


All times are GMT +10. The time now is 01:47 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.