Question regarding the ORM. Hopefully this does not sound like a dumb question. If you
unplug the MAF sensor to turn off the EGR circuit, is it possible for the boost of the turbo to
feed back through the EGR valve? This question is predicated on not having the SEGR kit
installed.

Thanks.

You will notice a very slight increase of diesel clatter and a little longer to have the engine warm up since you are not heating the coolant with the EGR cooler. Your fuel gauge will not go to E as fast and you will have some more power at times when the EGR would be open. The EGR valve is designed to hold back more than the full boost pressure and it is closed when under full acceleration any way. Biggest pain is the CEL which will be shut off by the SEGR kit. I thought I have read that those who have had emissions tests with Biodiesel have passed with out the EGR working. They don't do tests anymore in my location. Buy a cheap OBII tool to shut off the CEL if you need to.


Steve

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2006 Pearl Green CRD
Magnaflow 2 1/2" Cat Back
KJ Extra Leg Room Brackets, Carter Lift Pump, V6 Airbox, ORM
Fuel cooler, Oil Separator, Progard 7
Gauges EGT Boost Trans Temp Oil Pres, Michelin LXT AT2 245 70 R16
7,000# Draw Tight hitch, PML EX Deep Trans Pan
Centrifuge, SunCoast, Transgo, RAM TCM, InMotion Stage 2
Wife's 99 TDI VW Beetle

Does the MAF sensor have other functions?
How about elevation changes? Or is that a MAP?
Is a Scangage II an OBII device?

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'06 Jeep Liberty Sport CRD with: GDE Hot Flash and Tranny Flash, ehm, Cummins fuel pump, 3" Magnaflow muff, Moog K3199's, Skids, 225-75-16 10 ply, OME springs, Euro T/C, Shift kit, Trans cooler w/thermal bypass, Bigboy bkt, Samco CAC, Brake controller, Trans temp gauge, Al's Upper Arms

MAF is strictly EGR control - MAP is Baro at WTS and Boost while running, plus Intake Air Temp at all times

Scanguagedotcom for particulars in that matter

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'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go

The EGR is not completly closed using the ORM. It is slightly powered off it's mechanical stop. It does not move any more than that due to the unplugged MAF providing no feedback to the ECM hense the CEL. The AFC is not completely open either as it also is slightly powered off it's stop as well. Back when Tim pioneered the ORM/SEGR circuit, he found that unplugging the MAF, EGR, and AFC produced the best results and designed the ORM/SEGR so that the EGR stays completely closed and the AFC stays completely open, except on shutdown when the AFC is put back in service to aid in a smooth engine shutdown.

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2005 CRD Limited
1.5/2.0 Daystar Lift
V6 Airbox
SEGR ala TurboTim
255/70/16 Big O on Rubis minor trimming required
87k+ miles=3 factory TC's, 2 front pumps, 1 turbo, & drivers side wheel bearing/hub
Suncoast TC and Transgo Snake oil-41k
New Front Drive shaft-30K
Stage 2 InMotion Tune-54k, makes me go
B&M Tranny Cooler

The MAF is a single loop device so it does not control any other functions. SEGR is definitely the way to go...better performance and no CEL.

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Founder of L.O.S.T.
2006 CRD Sport
Mods: GDE Hot Tune w/ 364#@2000rpm/Air Box /3" Str8 Exhaust/ASFIR Alum Skids/245-75R-16 Cooper STT PRO/OME LIFT w/Clevis & 4 Spring Isos/AirTabs/Rigid 10" S2 LED/4xGuard Ctr Matrix Bumper
Drag Strip:Reac=.1078_60ft=2.224_1/8=10.39@64.8mph_1/4+16.46@80.8mph

How far does the pin in the EGR solenoid move? What kind of codes would a spacer 1/6" thicker stroke cause?