A week ago after pulling away from a traffic light my truck lost power but stayed running. It also threw code P0088. The outside temp was close to 90. I stopped, turned the truck off then restarted and drove off. This cycle happened 4 more times. If I was able to get the truck up to speed the problem went away. Also, when the temp dropped below 75 the problem went away. I've driven the truck 300 miles since the last incident without an issue. The outside temp has been 60-75 degrees. Yesterday my truck went into limp mode twice before I was able to get home. The outside temp was 83.
CAI filter brand new. Changed out both fuel filters last week.
P0088 points to the hpfp. If the pump is bad why would the truck work flawlessly in cooler temps yet have issues when it warms up outside? Do higher external temps have anything to do with this issue and are simply a coincidence? Could a bad or dirty MAF be a cause of this issue? Bad fuel?
Looking for your thoughts on what the issue could be. Temps here in Houston are beginning to rise so I'm anxious to get a resolution.
Same symptoms on my 2008 at 131K. Turned out was HPFP.
Ford has a TSB on this issue the HPFP P/N has been updated to a rev B part.
I have the 200K extended diesel care warranty. Ford sent a rep to my dealer to check fuel system then approved HPFP cab off replacement.
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