The cruise control stopped working, the truck was limping on initial acceleration, couldn't get past 50 MPH, and a scanner is showing a code: P0088 - Fuel Rail Pressure Too High. My understanding is that this code suggests that the high-pressure fuel pump (HPFP) could be failing.
I've changed both fuel filters at least every 10,000, and it has only been roughly 6,000 since both were changed. I drain the sump every two weeks, and I've yet to see any water. The truck has 36,120 miles.
The procedure to address this issue had been a cab off replacement of the HPFP. However, it is my understanding that Ford's procedure is now to just re-flash to correct the problem. I understand that the re-flash simply widens the parameters on the fuel rail pressure. I've listed Ford's procedure below.
Does anyone have any experience with this re-flash to get rid of the P0088 code and the limping? If this re-flash widens the parameters and the fuel pump can take the strain, I have no problem with the re-flash. However, if it is just masking the symptoms of a failing HPFP, then I am hopeful someone can offer some guidance as to how I can persuade Ford to replace the HPFP.
Is the re-flash a dependable fix?
Any comments would be appreciated.
6.4L - LACK OF POWER - DIAGNOSTIC TROUBLE CODE (DTC) P0088
Publication Date: July 17, 2012[/color]
2008-2010 F-Super Duty
This article supersedes TSB 11-4-22 to update the Service Procedure. ISSUE:
Some F-Super Duty 250-550 vehicles equipped with a 6.4L diesel engine may exhibit a lack of power concern with an intermittent DTC P0088; at full operating temperature during moderate to heavy acceleration. A calibration update is available to resolve this concern.
Follow the Service Procedure steps to correct the condition.
Intermittent P0088 diagnostics:
Check all continuous memory DTCs. Is DTC P0088 the only code present?
No - this article does not apply, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual to diagnose this concern.
Yes - continue to Step 2
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 79.05 and higher. This new calibration is not included in the VCM 2012.5 DVD. Calibration files may also be obtained at Buy Motorcraft Parts Online | Official Motorcraft Auto Parts Site | FordParts.com.
my friends dad has a 2010 6.4, and was having the same exact issue for a week, so they called me to see if I could help them out. before I could get back to them it ended up going away, but I gave them the information that I found on here anyways just incase the problem came back again. if it does come back, and he takes my advice on the re-flash I'll be sure to post up and let you guys know if it fixed the issue for your own knowledge.
I'm at the Ford dealership to have my P0088 code diagnosed. They are showing the code. Their solution is to do the reflash. Has anyone had any experience with this reflash? Is it dependable, or should I expect the HPFP to self-destruct in the near future? Does anyone know if there is a way to get Ford to do the right thing and replace the HPFP before it starts sending metal through the fuel system?
My friends dad said that the dealer didnt know what he was talking about with the re flash , and how friend/machanic said it was a 4000 dollar fix... How true any of this is I don't know, just what he told me
the re-flash per TSB 12-7-7 is the correct step. I had it but in the end I needed a new HPFP.
Get the flash it is the correct route.
Hey Folks - I got the 12-7-7 Reflash. A few weeks later the truck started throwing the P-0088 code again. Took it to a different Ford dealer and they did a cab-off replacement of the High Pressure Fuel Pump. It was done under the engine warranty - cost was zero.
After the job was done, I noted on the work order that they used a remanufactured pump. I spoke with the diesel mechanic who did the job and he said they cannot get a new pump anymore for this engine (6.4L).
Since it was free, it's hard for me to complain, and many times a remanufactured part is better than new.
It hasn't thrown any codes since the pump was replaced. However, the day I picked it up, I noticed a "clicking" noise that I had not noticed before. The mechanics said they noticed it too, but did not feel that it was alarming at all. They said that the noise is present on a number of trucks they maintain, but if it gets worse, it should be looked into.
I uploaded a couple of recording I made with my phone of the sound to the links below. Any input regarding this would be appreciated.