Guy from Sweden with smokey Cherokee XJ VM 1998 - Page 4 - AUSJEEPOFFROAD.COM Jeep News Australia and New Zealand

Go Back   AUSJEEPOFFROAD.COM Jeep News Australia and New Zealand > JEEP GARAGE > XJ / MJ Cherokee
Register Forums Trading Your Jeep New Garage Mark All Read

Post New Thread  Reply
 
Thread Tools Search this Thread
  #22  
Old 14-05-2018
Irie's Avatar
Irie  Irie is offline
I just registered
 
Join Date: Apr 2018
Location: Sweden
Posts: 13
What Jeep do I drive?: XJ
Likes: 2
Liked 5 Times in 3 Posts
Check out my Ride(s)
Default

Yes. I gonna try that.

Sometimes I wonder if they measured it the wrong way (?)

Damn. Found some soot around the exhaust when I drove back from work yesterady ;(

BTW. 2/ Failed EGR. If you remove the AGR & are able to blow air through from the inlet (pipe) side it is failed. Simple fix is to put a blank plate ( piece of tin can) between it & the inlet manifold. The valve is NOT 100% air tight

Thanx anyway. Ill get back to you all later
__________________
Jeep Cherokee XJ VM TD 1998
260000 km -161 556.51 miles

Last edited by Irie; 14-05-2018 at 07:01 PM.
  #23  
Old 15-05-2018
Irie's Avatar
Irie  Irie is offline
I just registered
 
Join Date: Apr 2018
Location: Sweden
Posts: 13
What Jeep do I drive?: XJ
Likes: 2
Liked 5 Times in 3 Posts
Check out my Ride(s)
Default

Another thought...I bought one of these ODB readers that works pretty OK. I noticed that it (ODB reader and APP) does not read the coolant temperature accurate. It seems to be stuck at - 20 deg C. The gauge in the car seems to working fine tho. In the Haynes manual (petrol) there is, of course, a relationship between that sensor and the cars computer.

What if the computer thinks its still -20 deg when its like +20 as it is today. Well in cold weather the Jeep need more diesel.

I also noticed that the ODB kit gets information from the MAF sensor (It varies with RPM). We discussed the MAF earlier...

I founs this in the manual i just got - The actual time that the fuel is delivered is veryimportant to the diesel combustion process. The MSAmonitors outputs from the engine speed sensor (flywheelposition in degrees), and the fuel injector sensor (mechanical movement within the #1 cylinder fuel injector). Outputs from the Accelerator Pedal Position sensor, engine speed sensor (engine rpm) and engine coolant temperature sensor are also used. The MSA will then compare its set values to these outputs to electrically adjust the amount of fuel timing(amount of advance) within the injection pump.

Any thoughts on that my friends
__________________
Jeep Cherokee XJ VM TD 1998
260000 km -161 556.51 miles

Last edited by Irie; 15-05-2018 at 07:12 PM.
  #24  
Old 15-05-2018
layback40's Avatar
layback40  layback40 is offline
Grumpy Old XJ Dsl Owner
 
Join Date: Jan 2011
Location: Northern Victoria
Posts: 13,781
What Jeep do I drive?: XJ
Likes: 4,579
Liked 6,550 Times in 4,342 Posts
Default

Quote:
Originally Posted by Irie View Post
Another thought...I bought one of these ODB readers that works pretty OK. I noticed that it (ODB reader and APP) does not read the coolant temperature accurate. It seems to be stuck at - 20 deg C. The gauge in the car seems to working fine tho. In the Haynes manual (petrol) there is, of course, a relationship between that sensor and the cars computer.

What if the computer thinks its still -20 deg when its like +20 as it is today. Well in cold weather the Jeep need more diesel.

I also noticed that the ODB kit gets information from the MAF sensor (It varies with RPM). We discussed the MAF earlier...

I founs this in the manual i just got - The actual time that the fuel is delivered is veryimportant to the diesel combustion process. The MSAmonitors outputs from the engine speed sensor (flywheelposition in degrees), and the fuel injector sensor (mechanical movement within the #1 cylinder fuel injector). Outputs from the Accelerator Pedal Position sensor, engine speed sensor (engine rpm) and engine coolant temperature sensor are also used. The MSA will then compare its set values to these outputs to electrically adjust the amount of fuel timing(amount of advance) within the injection pump.

Any thoughts on that my friends
OBD is useless, the system needs DBR 11 or 111, too expensive to buy. As its a old diesel you will see soot on the inside of exhaust. I think you are over ding your interpretation of everything.
__________________
98&01XJVMs,06&07KJCRD's,No longer question authority,I annoy it.More effect,less effort.10000Club
  #25  
Old 15-05-2018
Irie's Avatar
Irie  Irie is offline
I just registered
 
Join Date: Apr 2018
Location: Sweden
Posts: 13
What Jeep do I drive?: XJ
Likes: 2
Liked 5 Times in 3 Posts
Check out my Ride(s)
Default

Haha ok sir. Im overdoing almost everything in real life also. Well thats how you learn stuff.
__________________
Jeep Cherokee XJ VM TD 1998
260000 km -161 556.51 miles
  #26  
Old 16-05-2018
amlav's Avatar
amlav  amlav is offline
CrawlerStar
 
Join Date: Apr 2010
Location: Melbourne Australia
Posts: 402
What Jeep do I drive?: XJ
Likes: 88
Liked 111 Times in 90 Posts
Default

OBD reader on my diesel doesn't do anything . I could still get some basic info from the ECU by sending string commands trough the laptop to the reader and got back as far as I remeber voltage only .
  #27  
Old 25-05-2018
Irie's Avatar
Irie  Irie is offline
I just registered
 
Join Date: Apr 2018
Location: Sweden
Posts: 13
What Jeep do I drive?: XJ
Likes: 2
Liked 5 Times in 3 Posts
Check out my Ride(s)
Default

Ok. Found some new issues with my JEEP

1. Looked into some more about the coolant sensor. It is actually pretty important. So I took it off and found that it is a aftermarket one, with 3-pins instead of 2 (eeeh). I did some test on it and it seems to be broken. The cables seems to be ok (continuoty test).

[IMG][/IMG]

2. Good or bad injectors ?? They all sound alike.... Maybe they still are gunked up (??) I have to check them all I guess when I get the tools BUT when I was looking at the No 4 injector I found this... But, but... the fuel drain tube is not here. Someone put a plug in it. Why do you want to do that?? Is this some kind of "MacGyver" fix when the injector or the pump is bad??

How do I fix AND where is the "tee banjo fitting" - This fuel
drains into the fuel drain tubes (Fig. 7) and back to
the tee banjo fitting, which is connected to the same
line as the overflow valve, which allows a variable
quantity to return to the fuel tank.

[IMG][/IMG]

The saga continues...
__________________
Jeep Cherokee XJ VM TD 1998
260000 km -161 556.51 miles
  #28  
Old 25-05-2018
layback40's Avatar
layback40  layback40 is offline
Grumpy Old XJ Dsl Owner
 
Join Date: Jan 2011
Location: Northern Victoria
Posts: 13,781
What Jeep do I drive?: XJ
Likes: 4,579
Liked 6,550 Times in 4,342 Posts
Default

Quote:
Originally Posted by Irie View Post
Ok. Found some new issues with my JEEP

1. Looked into some more about the coolant sensor. It is actually pretty important. So I took it off and found that it is a aftermarket one, with 3-pins instead of 2 (eeeh). I did some test on it and it seems to be broken. The cables seems to be ok (continuoty test).

[IMG][/IMG]

2. Good or bad injectors ?? They all sound alike.... Maybe they still are gunked up (??) I have to check them all I guess when I get the tools BUT when I was looking at the No 4 injector I found this... But, but... the fuel drain tube is not here. Someone put a plug in it. Why do you want to do that?? Is this some kind of "MacGyver" fix when the injector or the pump is bad??

How do I fix AND where is the "tee banjo fitting" - This fuel
drains into the fuel drain tubes (Fig. 7) and back to
the tee banjo fitting, which is connected to the same
line as the overflow valve, which allows a variable
quantity to return to the fuel tank.

[IMG][/IMG]

The saga continues...
The temp sensor is a simple thermistor type. The later ones have 2. One in each of head 2 &3. Both of mine have failed & I have replaced the thermistors ~ had to open up the sensor to get at it, replaced the thermistor, a couple of $ at an electronic parts shop, & glued them back together with epoxy resin. If the 3 pronged one has 2 of the prongs showing the right resistance you can use it. If the temp gauge was working, the sensor was fine. Stop trying to fix what isnt broken.

That plug on the #4 injector return line is standard Bosch equipment. The return is via #1 where there is a hose back to the return valve on the back of the IP. This is the same on most Bosch systems including Mercedes Benz diesels of that type.

If you pull the injectors out, how will you tell if they are faulty? You cant by looking at them. Do not try & dismantle them once you have them out or they will become faulty.
You can get them tested by a diesel injector specialist.
Just remember the engine is not euro 5 or 6 when it comes to emissions. One expects some smoke.
Best you stop playing around with things you dont understand. Just get it tested without #1 injector sensor connected & then start your playing if you must. If you keep going down your current path you will end up with a shed full of bits & a jeep that wont go. Your approach sounds like a teenager with a toy that he is trying to work out how it works.
__________________
98&01XJVMs,06&07KJCRD's,No longer question authority,I annoy it.More effect,less effort.10000Club
Likes: (1)
Post New Thread  Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On





All times are GMT +10. The time now is 04:01 PM.


Advertisements




AJOR does not vouch for or warrant the accuracy, completeness or usefulness of any message, and are not responsible for the contents of any message. The messages express the views of the author of the message, not necessarily the views of AJOR or any entity associated with AJOR, nor should any advice be substituted as technical advice replacing that of a mechanic. You agree, through your use of this service, that you will not use AJOR to post any material which is knowingly false and/or defamatory, inaccurate, abusive, vulgar, hateful, harassing, obscene, profane, sexually oriented, threatening, invasive of a person's privacy, religious, political or otherwise violative of any law. You agree not to post any copyrighted material unless the copyright is owned by you or by AJOR. The owner, administrators and moderators of AJOR reserve the right to delete any message or members for any or no reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold harmless AJOR, the administrators, moderators, and their agents with respect to any claim based upon transmission of your message(s). The use of profile signatures to intentionally mislead or misdirect any member on this forum is not acceptable and may result in your account being suspended. Any trip that is organised through the AJOR forum is participated at your own risk. If you or your vehicle is damaged it is your responsibility, not that of the person that posted the thread, message or topic initiating the trip, nor the organisers of AJOR or moderators of any specific forum. This forum and associated website is the property of AJOR. No user data is harvested and no information supplied in your registration will be sold for profit.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

AJOR © 2002 - 2024 AUSJEEPOFFROAD.COM. All corporate trademarked names and logos are property of their respective owners. Ausjeepoffroad is in no way associated with DaimlerChrysler Corporation or Fiat Jeep.
www.ausjeep.com www.ausjeep.com.au www.midlifemate.com ausjeepforum.com www.r9kustoms.com
vB Ad Management by =RedTyger=