RAM 3500 Truck 2WD L6-5.9L DSL Turbo (2008)
Fuel Pressure: All Technical Service Bulletins
Fuel System - MIL ON/DTC P0251 Stored In Memory
NUMBER: 14-001-10
GROUP: Fuel
DATE: February 2, 2010
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 14-004-05, DATED JULY 8, 2005, WHICH SHOULD BE REMOVED
FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE ADDITIONAL MODEL YEARS AND
ADDITIONAL DIAGNOSTIC INFORMATION.
SUBJECT:
Electronic Fuel Control Actuator (FCA) Available For Service / New Diagnostics Available For DTC P0251
OVERVIEW:
This bulletin involves replacing the Fuel Control Actuator (FCA), **(now serviced separately)**.
MODELS:
2003 - **2009**
DR/DH
Ram Truck
NOTE:
This bulletin applies to vehicles equipped with a 5.9L Cummins Turbo Diesel (sales code ETC or ETH).
SYMPTOM/CONDITION:
Engine surges at idle or **MIL illumination. Further investigation may identify DTC P0251 - CP3 PUMP REGULATOR CONTROL - DIESEL. If
P0251 is present, follow the diagnostics in this SB. If other DTC's are present, repair as necessary before proceeding further with this bulletin**.
DIAGNOSIS:
ENGINE SURGES AT IDLE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
1. DTC's - Check for any Diagnostic Trouble Codes (DTC's) present **other then P0251 ** - Are there any DTC's stored or active ** other then
P0251**?
a. Yes >>> Repair as necessary before proceeding further with this bulletin.
b. No >>> Go to Step # 2.
2. Verify complaint - Verify proper fuel quality, grade, and level in the vehicle. Using the DRBIII(R), log the fuel pressure set point and fuel pressure.
Operate the engine at idle speed. A good system will have actual fuel pressure that is +/- 500 PSI from the set point. (Example: If the fuel pressure set
point at idle is 6500 PSI, the actual fuel pressure on a good system is expected to be between 6000 - 7000 PSI). If fuel pressure variation is
excessive, an audible surge will be present. If the variation is severe, a slight engine speed variation may also be noticed. - Does the fuel rail pressure
fluctuate more than +/- 500 PSI?
a. Yes >>> Go to Step # 3.
b. No >>> Go to Step # 7.
NOTE:
A loud "knock" and black smoke that exists with a pressure drop may be an injector issue and should be identified using single cylinder cut-out test.
