Comming back from vacation, the CEL came on. P0088 fuel rail pressure to high............what do ya think??????? Yes filters changed.
Known problem on HPFP fuel pump. Ford released TSB and updated "B" suffix pump to fix.
Here is TSB
TSB 11-4-22 6.4L - LACKS POWER - DTC P0088
Publication Date: April 27, 2011
FORD: 2008-2010 F-250, F-350, F-450, F-550
This article supersedes TSB 11-4-15 to update the Service Labor Time Standards.
Some F-Super Duty 250-550 vehicles equipped with a 6.4L diesel engine may exhibit a lack of power concern with an intermittent diagnostic trouble code (DTC) P0088; at full operating temperature during moderate to heavy acceleration.
Follow the Service Procedure steps to correct the condition.
Intermittent P0088 diagnostics:
Check all continues memory DTCs. Is DTC P0088 the only code present?
No - do not continue with this procedure. Refer to the Powertrain Control/Emission Diagnostics (PC/ED) to diagnose this concern.
Yes - continue to Step 2
Replace the high pressure pump (HPP). Refer to Workshop Manual (WSM), Section 303-04C for HPP replacement.
Both the fuel volume control valve (VCV) and fuel pressure control valve (PCV) adaptive learning parameters must be reset after a HPP replacement. Refer to PC/ED, Section 4, Hard Start/No Start Diagnostic Subroutines step 7 to reset adaptive tables.
PART NUMBER PART NAME
8C3Z-9A543-B High Pressure Fuel Pump
OTHER APPLICABLE ARTICLES:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
OPERATION DESCRIPTION TIME
110422A 2008-2010 F-Super Duty 6.4L Regular Cab: Check DTCs And Replace the HPP Includes Time For Prior Approval, Remove And Install Cab, And Reset Both VCV And PCV Adaptive Learning (Do Not Use with Any Other Labor Operation Except For Other Applicable TSB Articles) 8.9 Hrs.
110422A 2008-2010 F-Super Duty 6.4L Super And Crew Cab: Check DTCs And Replace the HPP Includes Time For Prior Approval, Remove And Install Cab, And Reset Both VCV And PCV Adaptive Learning (Do Not Use with Any Other Labor Operation Except For Other Applicable TSB Articles) 9.1 Hrs.
BASIC PART NO. CONDITION CODE