Ford says anything plus or minus 10 on fuel trims you have a concern low fuel trims are caused by faulty injector or unmetered fuel entering cylinder which pcm responds by taking fuel away from cylinder a high fuel trim is cause by faulty injector as well and low compression when pcm sees a paticular cylinder not turning as fast as the others it will add more fuel to speed up that cylinder once pcm can no longer compensate for that cylinder the cel turns on and you will have cylinder contribution codes if it's severe enough it will also set misfire codes sometimes if metal is in the system it can intermittently hang inj open longer then should which results in more fuel causing that cylinder to speed up which pcm sees that in crank sensor signal and will put the truck in reduce engine power and wrench light will appear and code p252f engine oil level overfull thinking it's trying run away which in reality inj causing the problem

 

Ok after emailing back an forth with mike from spartan diesel and talking to the tech working on my truck. I decided to go ahead and change the hpfp. The injector is out of spec. I'm getting the repair done cab off. To have one labor bill i'm having them put head studs in and they said it was no problem to do the egr & cooler delete. We believe hpfp pump is failing hence the change of pump and since one injector is acting up and needs replaced I'm just going to have them all changed. Figured again one labor bill and since one is out of spec and with failing pump others might not be far behind. Is there anything else i should consider while the cab is off? Thanks for all the info and help.

 

I gave you the best advise about how to handle your concern, that was to file a claim for water damge caused by bad fuel.

 

Yeah i'm working on that. Thanks for the advise. Just wanted to address any weak points or common failures. I guess anything that would be good to inspect while easier to access or work while cab is off. Thanks

 

Yeah, start the claim as I don't think ford is going to warranty it.

Unfortunately the HPFP has to be turned in as a core, otherwise it would be nice to open it up and have a look.

 

Open it up, look at it, put it all back together and return the core. The pump is the best place to find water damage.

 

Ok I'll do that. Looking for rust spots correct?

 

Rust spots or signs of lack of lube. When you do it post some pictures and I or someone that knows what they are looking at /or for can help.

 

Ok will do. Thanks again

 

Just some thoughts I had. If I find damage in hpfp from water. How do I prevent this from happening in next hpfp?? I drain the water separator once a month religiously. Change fuel filters every 10,000 miles. Always run a fuel additive in every tank of fuel. Yet still hpfp failure?

 

Many places will put emulsifiers in their tanks, thats bad news.
Buy fuel from very busy stations.

 

Ok. Yeah i only buy my fuel from busy stations in my area.

 

After my clogged separator scare, I have gone to draining the water separator every 2-3 weeks. I have yet to get any water out of it but I drain out about a quart of fuel out of it anyway. I have also gone to changing the fuel filters every 5,000 miles instead of every 10,000.

 

[IMG]https://cimg4.ibsrv.net/Shop finally had room to get my truck in.
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Shop finally had room to get my truck in. Cab is up and valve covers off. Here's a couple pics of injection pump. Any input as to water damage?

 

Here's a pic of my truck in the shop. There's a couple pics of the rocker arms on the driver side the coser pic shows what i believe to be a really wore down nub/tip on rocker arm. Is it better to try and change just the wore ones or can you get the whole thing as a unit? Also where would be a good place to get something like that?