I have read many reports that the MAF on the 2.8 Diesel will have no effect on the running of the engine if you unplug it other than deactivate the EGR. So my question is, .... Is the EGR the only thing the MAF sensor controls on the diesel? What is its actual function and can it cause poor running of my CRD?

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2005 Jeep Liberty, GDE Ecotune, 31x10.5x15 with 3" Daystar Lift, Gabriel Struts and shocks.

the maff sensor measure the Mas Air Flow and for what i know , work with the ECU for handle the EGR , try to unplug the sensor and whatch if you have some change in poor running

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ECU Tuner -EGR OFF -DPF OFF Swirl/Flap OFF, Lambda OFF , DTC OFF in many cars , not ONLY

https://www.facebook.com/YetiChiptuning

Some including myself have either unplugged the MAF or removed it from the air box and left it plugged up to deactivate the EGR valve. I did the latter for a while till I made a block off plate and installed it on the EGR valve. With it removed it will keep setting a CEL code since the OBC does not sense any air flow through the air box. I could only tell an improvement in engine performance with the EGR being disabled. I do not believe it serves any other function?

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve

Oh so you blocked the EGR without a tune? Just with the ORM?

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2006 CRD - GTB2056 turbo by Dieselguy86, Eco Trans Tune, Lift Pump, Week's, HDS Tstat, Racor Filter, ARP's, OME 790's+Top Plate, JBA 2.5", JBA UCA, Moab's+265/75R16, ARB Bull Bar, 4.10's, TrueTracs

Made a solid plate and completely blocked off the EGR inlet, left it connected electrically, plugged and removed all the coolant hoses to the EGR. Put the MAF back in service (no ORM) since I don’t care if the EGR operates or not (no exhaust feed). Then removed the butterfly out of the FCV.
See my earlier post at http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=76576
for block off plate dimensions.
Jeep runs great now and am getting 25+ mpg around town.

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve