There are alot of initials and abreviations used on this forum that I don't understand. I'm new to the whole Jeep and diesel thing so can someone enlighten a new commer?
Thanks,
Steve

ORM = Off Road Modification (so called because it is not legal on the highway). It involves unplugging the MAF (Mass Air Flow) sensor to disable the EGR (Exhaust Gas Recirculation) valve. Very simple to do, but it does leave the CEL (Check Engine Light) on at all times.

SEGR = Synthetic EGR. This is an electronic circuit that fools the engine computer (ECU) into thinking the EGR is connected and working, when it is in fact disabled.

EHM = Elephant Hose Mod (so called because the hose can resemble and Elephants trunk). It involves venting the crankcase to atmosphere rather than to the suction side of the turbo.

FCV = Flow Control Valve. This is the term used in the service manual to describe the motorized butterfly valve in the intake tract. Its purpose is to choke the engine on shutdown so it stops smoothly and to create a pressure differential in the intake tract which will help the EGR valve do its thing.

GDE = Green Diesel Engineering. They provide ECU tuning services to enhance performance of our CRD (Common Rail Diesel).

These are some of the most common TLA (Three Letter Acronyms) that you will find here. Feel free to ask about others.

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Matt B.

05 Limited CRD. Bought it new. 112k on the clock now.

GDE Eco-tune, rear differential drain plug (drilled and tapped the pumpkin), transmission pan drain plug, Fumoto oil valve, fuel filler neck restriction removed, front hitch, Hayden fan clutch, Sears P1 battery since 08, Mobil 1 5w40, 5 volt glow plugs, DIY timing belt at 109k

Matt, Thanks for the info. I just noticed you are in East Tn. What town? I'm up in Roan Mtn near the NC line.
Steve

Another common one is TC = Torque Converter.

Also ECU or ECM = Engine Control Unit or Module. It is on the driver's side fender behind the battery.

TCM = Transmission Control Module

#2 = Regular #2 petroleum-diesel as opposed to biodiesel (BD)

CAC = Charge Air Cooler (the radiator-like thing that cools the compressed air coming from the turbo before it goes to the intake)

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

CRD - Common Rail Diesel
SNAFU - not printable
FUBAR - not printable
JAFO - not printable

_________________
2005 CRD Limited Flame Red w/ Renegade rock rails & light bar, AirLift 1000. 225/75R16 MT/R's on cheap black steel wheels, dual MOPAR subwoofers, Ipod kit & seat covers, Samco hoses - totaled and gone. 2008 WK Laredo 3.0L diesel - AirLift 1000, wife won't let me mess with it much. 2013 JK Sahara on order.

Not familiar with JAFO. . . . ?

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

Just Another effin Observer

_________________
2005 CRD Limited Flame Red w/ Renegade rock rails & light bar, AirLift 1000. 225/75R16 MT/R's on cheap black steel wheels, dual MOPAR subwoofers, Ipod kit & seat covers, Samco hoses - totaled and gone. 2008 WK Laredo 3.0L diesel - AirLift 1000, wife won't let me mess with it much. 2013 JK Sahara on order.

Lol nice. . .

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

Why can't we just call it an intercooler like the rest of the world?

_________________
-Rich
It must be air in the fuel!

Because they are all JAFO's.


Or would that be JOFO's?

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

The CAC makes sense now. I kept reading about cac hoses and couldn't figure out what they were talking about. I am restoring a Buick Grand National so I was definately used to an intercooler but the CAC was a first for me.

Cool, what year GN?

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

Its an '84 hot air car but I'm in the middle of a twin turbo intercooled set up. I might finish it in my lifetime, if I'm lucky.

That ought to give you a whole lot more in the top end. More top end = higher speed in the 1/4 mile. . . .

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

FSM= Factory Service Manual

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)