Changed the fuel filters on the new to me 6.4 I have had since February and this is what I find.

 

More info...how many miles/hours on said filters? were they new when you bought the truck?

What type of fuel are you running?

Look the filters over...is there an FF on them? That would indicate that they were the originals.

Mine have never looked like that so unless those have been in there way longer than they should be you should look at your fuel source.

 

Its not the condition of the filter that I am upset about. That filter is fine. Its the 3 metal flakes that tells me the HPFP is on borrowed time that burns my britches. Filters and HFCM were clean. Took the HFCM apart because the seperator wouldnt drain so I decided to change the filters. Luckily I found it and it didnt leave me high and dry on the road. Secondary filter had fine metal powder on it.

 

I saw that speck there but didn't exactly know what it was. I see what you mean.

 

Air Dog II will be going on after she gets back from Ford.

 

Umm hate to burst your bubble, that filter is horrible it looks like the maintenance has not been kept up, i change mine every 10k miles and it never looks anywhere close to that condition.

 

I agree with BigSilly, that filter looks like it should have been changed long ago. I've heard of.denied warranty claims for the high.pressure fuel system for lack of maintenance. Perhaps your HPFP was starved for fuel and this caused the metal flakes?

 

Filter looks like every clean filter I have pulled out of my 6.0 and now this 6.4. The HFCM when taken apart looked like it had 200 miles on it instead of 70k. That filter is fine. No signs of fuel starvation or a "sucked in" appearance on either that one or the secondary one. Previous owner had filters changed at 60k.

 

Maybe a change at 5K is in order. then you can see if there is anymore metal?

 

60k miles is WAY WAY to long on the fuel filters on the 6.4L, It is widely accepted to change them every 10k miles. The fuel systems on the 6.4l are really sensitive, so the lack of fuel filter changes is most likely what lead up to the metal flakes you are now seeing.

 

you need to go back and read his post again.....

 

Agreed. They were changed at 60k by the previous owner.

 

Wait, isn't this 4 micron filter in the engine valley BEFORE the HPFP? If so, what makes you think the metal flakes are any indication that the HPFP is doomed? Maybe the filter just did it's job and caught some junk that ended up in the fuel tank or a low-pressure pump under the truck that getting ready to take a nose-dive?

Explain?

 

I believe that the idea is that metal shards from a failing HPFP get sent downstream to the injectors, but remember that a large portion of fuel from the HPFP gets returned to the tank after going through the fuel cooler. That's why whenever there is a HPFP repair the tech has to clean the fuel tank, low pressure lines, and the HFCM.

 

What he said^^