05 CRD Limited 125k miles, new to me this spring, TB replaced last month. Today, driving north of Reno, 100+ degrees, I took off to merge with traffic on a long hill, all of a sudden performance died. I got up the hill by gearing down, hooked up my OBD2 unit, and looked at the boost. (BTW, this is at about 5k elevation). Where i would expect it to power up the hill with 15PSI boost, I was seeing 5 or less. Headed on home like that, and had to make a brief stop at Home Depot to buy a new air conditioner (did I mention that it's hot here). Came out and expected it to get me home with minimal power, as I thought maybe it had blown a boost hose. I was surprised that it had returned to its normal excellent performance. Any idea what happened? I didn't check to see if it has thrown any new codes, but I am running ORM. No tune (yet).

My guess would be air in the fuel system. This sort of thing has only happened to me once since I installed the in-tank lift pump five years ago. It happened at 7,500ft on a hot summer day.

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2006 CRD Limited Dk Khaki
InMotion S-II, GDE TCM, Cummins Lift Pump, Mishimoto CAC hoses
Cooper Discoverer ATP LT245/75, Rola roof basket, JCR S3 sliders
OME lift+JBA UCA's, custom front hitch receiver, Mile Marker winch
All J Products rear cargo shelf
Sips biodiesel as if it were 12 y/o Scotch

Sounds like it went into limp mode due to fuel starvation; consider adding a lift pump in the tank as some of us have done to solve this problem. (been there done that) In the mean time, if it does it again; pull over, stop the engine, and pump up the fuel head and then restart and see if the problem disappears. If it does, you have diagnosed your problem....

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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

before you add the lift pump....did you change the fuel filter?

they can get clogged - and as noted fuel issues seldom throw codes - just go into limp mode

(commonly clears when you turn it off/on)

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2005 CRD
stuff
Skeptic quod gratis asseritur, gratis negatur

I think you guys have hit on the problem, thanks. Yes, I changed the filter, along with pretty much everything else in the noob guide. I was hot and frustrated this afternoon and didn't think of that. I guess that I could diagnose it a bit by bleeding it again and seeing if there is any air.

Ed

Sounds just like a filter on the verge of being blocked. Fuel makes boost, they say. You only notice it under high demand. Then after a restart you can drive away.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

I doubt it's that. Fuel filter was changed in the last 1k miles.