It is currently Tue Jul 07, 2020 3:07 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 50 posts ]  Go to page Previous  1, 2, 3
Author Message
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Sun Jan 15, 2012 3:26 pm 
Offline
LOST Newbie
User avatar

Joined: Sun Dec 25, 2011 8:16 am
Posts: 59
Location: Pretoria, South Africa
Hi Bill,

Ok so the pre 05 wouldn't have had the variable vane turbo then? What is the purpose of the turbo vanes? I blocked the
vacuum pipe as shown. I haven't had opportunity to hit the highway yet but can report significantly less turbo lag and 13L/100 IN TOWN. Best I could get before that was around 15L/100. This obviously only what the computer is telling me after about 60km of driving around today.

_________________
Image
'04 Liberty(Cherokee) stock.


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Mon Jan 16, 2012 4:19 am 
Offline
LOST Junkie

Joined: Tue Jan 26, 2010 4:26 am
Posts: 844
Location: Hoedspruit , South Africa
dylan7495 wrote:
Hi Bill,

Ok so the pre 05 wouldn't have had the variable vane turbo then? What is the purpose of the turbo vanes? I blocked the
vacuum pipe as shown. I haven't had opportunity to hit the highway yet but can report significantly less turbo lag and 13L/100 IN TOWN. Best I could get before that was around 15L/100. This obviously only what the computer is telling me after about 60km of driving around today.


The variable vanes give a much better performance as it reduces turbo lag....the newer 2.8 CRDs have much more power.
Unfortunately we owners of the older CRDs cannot just bolt on a newer variable vane turbo as the ECU is completely different.
I am supprised you feel there is less turbo lag...I only find that it is better on the open road escpecially when going up long hills at about 120 kmh. I have the 2.5 CRD Sport, 5 speed manual so I do not have an onboard computer. I get about 10.5 L/100 km on a mix of mainly freeway driving with a bit of town driving....no stop/start traffic here in White River :)

_________________
2002 Export CRD 2.5 Sport


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Mon Jan 16, 2012 4:36 am 
Offline
LOST Newbie
User avatar

Joined: Sun Dec 25, 2011 8:16 am
Posts: 59
Location: Pretoria, South Africa
Aaah, so the vanes concentrate the exhaust gasses to keep get the turbo spinning sooner at lower rpm? That is how I understand what you have described. Stop start traffic is an everyday reality here in Centurion.

_________________
Image
'04 Liberty(Cherokee) stock.


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Fri Aug 24, 2012 6:12 am 
Offline
LOST Newbie

Joined: Wed Aug 22, 2012 11:13 pm
Posts: 42
Location: Issaquah, WA
Reading through this I have a few questions. First is the only reason for the mass air sensor to control the EGR? So if you did something like get a new performance program that shuts the EGR off could you just get rid of the mass air flow sensor all together? Where I'm going with this is then you could really open up the intake and get rid of the stock airbox for a more open element that actually flows more air.

Next question, by simply unplugging the mass air flow sensor the CEL comes on. I'm hearing reports of less smoke, better mileage, and more noise. This leads me to belive it's putting the computer into a "limp mode" in that it's probably reducing the amount of fuel being injected as well as advancing timing. Can anyone confirm this? Does anyone have a scan tool that can read mass fuel desired, and timing to see if it is cutting fuel and changing timing? The reduced amount of fuel being injected would be a likely reason for better mileage and less smoke. The EGR shouldn't be on when you nail the throttle from a dead start which is what leads me to belive this is more what's going on than that the EGR is on causing the smoke under normal conditions. Also the more "diesel" sound that's described is classic advanced timing. I guess all in all if it works it works but I'm wondering if there is more going on here than what people realize and that shutting it off via programming would be the better way to go.

_________________
Her's: '05 Jeep Liberty CRD. Stock for the moment

Mine: '96 Ford F-250 PSD. Custom fuel system, big injectors, Big HPOP, Custom turbo, Billet Rods, Custom Pistons, Ported Heads, BTS Built Transmission, N²O. 12.6 @ 105 in the 1/4. 806hp on the dyno.


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Sun Feb 10, 2013 9:29 pm 
Offline
LOST Newbie

Joined: Sun Feb 10, 2013 9:03 pm
Posts: 1
just wanted to thank all those who put good advice on here , im in my second week of crd ownership, simply just drove it the first week with about 23 mpg. so over the weekend i started taking some of your advice, started with the no brainers , oil and air filter change, then i did the EHM, and the ORM and cleaned the MAF, really smothed things out like you said it would, will have to wait to check milage, i have orded a fuel filter and will change that when it comes in,

i do have a quick question on the orm mode and the cel coming on, i own a cheap harbour frieght scanner and it works well cancelling the light allowing it (the light) to come back on if something else happens. kind of a pain to start the engine twice everytime i go somewhere though so i can get the fault, inorder to cancell it. so my question is. is it ok to leave the scanner plugged in all the time, so i can omit one of the engine starts, i know i should not connect or disconnect the scanner with power to it, but not sure if it will cause any damage to anything if left plugged in. any help would be appreciated,

as time allows i will start checking all the turbo things as per your advice
2005 kj crd 74000 mile


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Mon Feb 18, 2013 8:26 am 
Offline
LOST Newbie

Joined: Mon Feb 18, 2013 5:17 am
Posts: 5
So I am curious the ORM that is done, doesn't it affect turbo boost pressure? Since the EGR would in a way act as a vent for over boost wouldn’t blocking off the EGR cause your turbo to run boost with no added bleed off? Blocking the EGR system mechanically will negate the turbo over boost and turbo surge bleed function regardless if you block it near the intake manifold or next to exhaust manifold. The turbo bleed function is also part of the base software for protection in certain situations, this bleeds off excess air from intake out the exhaust.
Couldn’t this also cause the hoses of your turbo as well as the turbo to over pressurize causing failure even omitting the ridiculous ccv setup. (never had a vehicle with a turbo) Also if I'm not mistaken Wouldn’t the ORM when unplugging the MAF with the engine running be risking the possibility of a short?

(Side rant) I do believe that the EPA has totally screwed up a piece of tech that well worked for over a 100yrs. after refining it and well eventually disregarding “if it isn't broke don’t fix it.” The diesel engine in my VW was 90 mpg and my 1966 gas ram charger that runs on leaded and unleaded gets 25 mpg oh they pass emissions to per a exhaust gas analyzer they run better than cars on the road that are new. The jeep CRD should really get better mpg considering a 8,000 lb. Cummins can get the same.


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Mon Dec 23, 2013 4:18 pm 
Offline
LOST Newbie

Joined: Sun Dec 22, 2013 6:51 pm
Posts: 2
Location: florence or
can you give me info on the SEGR, ORM, jeep CRD, ho can I contact to buy the kit, hambonecrd.,mhammond54@gmail.com


Top
 Profile  
 
 Post subject: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Sat May 09, 2015 4:21 am 
Offline
LOST Newbie

Joined: Fri May 08, 2015 12:07 pm
Posts: 1
Hi. Do you perhaps know if it is possible to buy this segr in south africa?


Sent from my iPad using Tapatalk


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Tue Jun 16, 2015 4:40 pm 
Offline
LOST Newbie

Joined: Fri Jun 12, 2015 11:59 am
Posts: 1
Ok I unplugged the MAF, drove vehicle, turned off, drove again, turned off, went to drive again, and the motor sputters and darn near stalls out hard... no matter how hard you mash the gas to the floor. I have tested this twice and it has happened the same way each time. It thows the cel light as expected but it doesn't run fine... and honestly not suprized by this... MAF sensors are typically used to measure flow to regulate injector pulse... Any advice/comments welcome.


Top
 Profile  
 
 Post subject: Re: OLD NAVY: ORM ... Off Road Mod ...
PostPosted: Mon Jul 13, 2015 9:44 pm 
Offline
LOST Member

Joined: Thu Mar 13, 2014 12:13 am
Posts: 454
Location: Prescott, Arizona
BigJiggity wrote:
Ok I unplugged the MAF, drove vehicle, turned off, drove again, turned off, went to drive again, and the motor sputters and darn near stalls out hard... no matter how hard you mash the gas to the floor. I have tested this twice and it has happened the same way each time. It thows the cel light as expected but it doesn't run fine... and honestly not suprized by this... MAF sensors are typically used to measure flow to regulate injector pulse... Any advice/comments welcome.


It is my understanding that the MAF supports ONLY the EGR function, nothing else. It sounds like you have another issue, either air in the fuel filter head or loss of boost from a blown CAC hose, pre or post intercooler. Try purging the fuel filter head and checking your hoses for porosity, weeping oil and cracks. Also, it wouldn't hurt to clean the MAP sensor if you haven't done it already. It can lead to its own set of problems, but yours sounds too extreme for a MAP issue.

_________________
2006 Limited CRD: Frankenlift II, Fumoto Drain Plug, DIY Stage 1 Tune, In-Tank Lift Pump


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 50 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group. Color scheme by ColorizeIt!
Logo by pixeldecals.com