Good Day,

I have an 06 Jeep CRD, Throwing a P0299 low boost code. I could really use some help. Has anyone ever encountered this problem:
- It struggles to make RPM under no load, even at idle
- Low Boost code on scanner even under no load condition

I have been working on this for months and have checked and/or repaired the following with no change to main complaint. I live in the Virgin Islands with no access to a certified Chrysler dealer to run diagnostic. WE have steep grade hills and the vehicle must make power starting on a hill. I bought the vehicle and had it shipped here. It had a multitude of diagnostic codes and running problems that I have worked through and repaired. The vehicle cannot be used at all in its current state.

The Following has been done:
- Changed CAC hoses
-Sasquatch stage 1 EGR delete and Green Diesel Eco Tune
- Changed turbo Charger and actuator
- Both vacuum control solenoids and vacuum modulator
- Test and changed all Vacuum hoses and checked vacuum reservoir. Final INHG at vacuum modulator control outlet is 13 INHG
-Changed timing belt, rocker arms, crank case vent bypass, new K&N intake, new accelerator peddle, inline electric fuel pump, fuel filter base & heater plugs upgraded, map sensor, fuel quantity solenoid, fuel pressure sensor, tank pick-up, fuses and relays,
- Fuel Flow test- no air in line,
- Checked harness for chafing behind fuel filter housing connections and grounds.
-Installed manual boost gauge which shows 22lbs on flat road, but when encountering hills cannot calibrate for load and drops down between 0- 5lbs
- Shows no heavy smoke or misfire
- Problem persists regardless of stock or eco-tune
- Leak down tested charge aircooler and intake system, intake manifold has been completely cleaned

Any transmission trouble codes in the TCM?

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2020 Ram 1500 CC Ecodiesel Limited
1995 Dodge Ram 2500 4x4, 5.9 Cummins, 47RH, Reg Cab
2005 Liberty CRD,fixed the rockers and a couple more things,GDE Hot tune,Weeks Stage 1 and 2 EGR delete,Hot Diesel solutions Tstat assembly(wonderful heat!), ARP studs, OME 1.5" lift.....thanks Seth! (Sold)
2006 Liberty CRD....The Moose Hit

I got this code recently, It turns out that the clamps had worked themselves slightly loose on my CAC hoses, and I also bled the fuel head for air. I then deleted the code, and it hasn't yet returned. IDK if this will help you...

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"Libby"
2005 Liberty CRD 4x4 Silver
Samco Blue, Etechno 7V, ORM, homemade shackle recovery pts, OME 2.5, 245/75/16 dueler ATs on JKU steelies, timng belt, DIY roof cross bars, more to come...
110000 miles and counting (hopefully!)

No leak down tested several times already. Does anyone know how to test ecm signal to the boost modulator?

Yes when I first recived the car it was in third gear limp mode. Transmission DTC code for transmission fluid temp sensor and electric fan remained on. I did a complete servuce of transmission and tested the sensor. It was ok. I put everything back together and replaced the TCM relay and dtc code cleared and has not been a problem since.

So.ething I did notice with the transmission is when GDE eco t u ne software is installed I get a terrible vibration from the transmission when in gear, intermittently.

If I flash back to stock it does not do it. I also often find the transmission dip stick pushed up two inches out of the dipstick tube after running the car. Vibration does not exist with transmission in park.