Can anyone offer information about calibrating the injectors with the ECM on 2005, 2.7 CRD? I pulled all four injectors and sent them out for testing. They were marked and re-installed into the same cylinder they were removed from. The manual states that when an injector is removed it needs to be re synched with the ECM via the code on the top. I am thinking this is due to the possibility they may be placed into a different cylinder by mistake, for how would the ECM know they were removed or not? Anyway the manual indicates possible running problems such as hard start or poor running which is what I have been experiencing since it was done. I know what the manual says to do, I am just trying to understand why is it necessary.

Thanks for any comments

2005 2.7 Liberty CRD Stock

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

A 2005 Liberty with a 2,7? I think you mean the 2,8 CRD?

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WJ 4,7 HO Overland 2002
KJ 2,8 CRD Red River 2003

If they were originally programmed correctly and you put them back in the same locations then you're good.
I think a DRBIII is required to program the code into the PCM.

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Resurrected 2005 Liberty Sport CRD
Canadian DRL mod

CRD Motor/Timing Pics
http://www.flickr.com/photos/68442076@N02/sets/72157629389449367/

X2 If you return them to the same spot, nothing needs done.

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05 Liberty CRD Sport with Leather 115k
GDE ECO, No EGR, no FCV, (system gone)
Oil Drain plug P/N 090-039
K&N Air Filter, 2nd gen Fuel filter head
NEW Rockers & lifters
Mobil 1 0w-40
Stant 13519 195 deg inline Thermostat.
0 281 002 845 MAP
Etecno GX3123 7v Glow Plugs
Advance Gold 800CCA Battery
Traded it for a Quality VW TDI

I think the serial numbers are on the bar code on the timing cover. Listed cyl. 1 thru 4. After I replaced 2 of mine with used ones it made no difference before or after the ecu was calibrated.

Same injector same hole no issue. Mixing injector #4 plug with the identical fuel rail plug = no run.

Somewhere around here, if memory serves, there is a GDE comment to the effect that while programming the ECU for specific injectors in specific holes is desirable that failure to do so has only a small impact on mpg.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs