Do you know of anyone tuning the DPK and had a cp4 failure? I’m just now starting to follow this thread. Is it a guaranteed preventative measure to save the injectors and rail?

 

Guaranteed? Don't know but it has been tested on a truck that the CP4 was deliberately buggered up and the truck ran 200 miles pulling a load before the CPR exploded and the only thing that needed to be executed was cleaning the return lines, fuel lines, fuel tank and replacing the CP4. If I find the video I will edit this post and post it.
Their are 3 parts to this video, here is part 1

 

That's the Air Dog unit I have. Not installed yet, want to have it feed my factory DFCM primary pump, and want a Titan 50 gallon tank and Fleece Performance sending unit (made for aftermarket fuel pumps) for my truck, so more figuring out to do first because the FS2500 oil bypass filter I have is mounted where I'd like to install the Air Dog on the same side as the DFCM, AND will more than likely install the Dieselcraft OC25 centrifuge oil bypass filter in the front of the truck behind the grill to the right where I'll have to figure out mounting for it AND move the horns somewhere in front there, which would replace the FS2500. Retiring next year so I'll have more time to do this stuff.

What kind of truck is that?

Good move. Now you'll be set to protect the rest of the fuel system if the unfortunate were to happen again. Look into running additive to not only increase lubricity but also add cetane points to fuel and a fuel cleaner. In my case, I've been running K100D since the truck was just about new to control water.

Good luck moving forward. Educating yourself further on your truck and diesel fuel will enhance your diesel truck experience and you will learn not worry.

 

Make sure you get the newest DPK version from S&S. There are some other ones out there that don't filter as effectively, which essentially makes them useless imo.



Yeah, that's what I'm thinking.

 

My insurance went up for two windshield replacements, so I guarantee a 12k claim it will go up or you will get cancelled

 

Dude, Get your mind INTO the gutter, THEN it will make sense!

 

The design alone prevents the metal debris from the crankcase ever reaching the injectors. The design of the CP4 has fuel entering the crankcase to cool and lubricate the cam and rollers, and then feed fuel to the pump heads via the flow control valve. The DPK regardless of which one, splits the fuel to two separate feeds, one feeds the crankcase, which returns fuel back to the fuel tank, the other feeds the pump heads via the FCV. The return fuel from the heads is via a regulator on the high pressure side after feeding the injectors, and merges with the fuel coming from the pump to be returned to the tank. Both SPE and S&S have a filter to catch larger particles, S&S a finer filter to catch the fines. There should be zero debris past the filter on the S&S. If the SPE kit is installed but not checked regularly, and the CP4 gets to the point where S&S trashed it, that finer stuff can get past it, but SPE thinks that there would be enough larger debris first that will drop fuel pressures enough to trigger a CEL so no debris would get past it.

No matter what, the High pressure side is 100% protected from any damage with one of the good Gen 2 DPK. Ive got the SPE Gen2 and it looks like it came from the factory. I do plan to add an S&S filter at some point just for 100% insurance. The advantage of the SPE is I can visually check for debris where the Gen 2 S&S no longer has the visual filter.

 

OK so guess what..... I took the truck today to have the DPK installed tomorrow. Keep in mind I have only driven the truck one time and just to fill up with Fuel since bringing it home from the dealer in PA. [ Parsons Interstate Ford in Shippensburg PA} When I dropped the truck off today at my local diesel repair shop I just thought I would pop the hood and take a look. I had already did that when I picked the truck up but I was looking more in the area of the fuel pump and everything that had been removed to get to the CP4 to see if everything looked in order...Well today when I looked I noticed the lid was not on the coolant jug. Luckily it was still setting right where the dealers mechanic had left it when he forgot to put it back on. anyways if you are near Shippensburg PA. you probably do not want to have work done at Parsons Interstate Ford. So what would be the effects of driving 7+ hours with no coolant cap installed? Coolant level still looked good. Is this system pressurized? Cant make this crap up...Its unbelievable how unprofessional and incompetent people can be and still charge nearly $15,000.00 dollars for the work!!!

 

All cooling systems are pressurized. That is how you can have a coolant temperature of over 212 * F , and not boil . Usually 16 psi .

 

if you’re not hauling then probably nothing will happen - I drove 200 miles with the cap on the battery and didn’t lose coolant. It happened after a shop replaced the entire aircon and cleaned the radiators.

 

well that’s great news. It seems to be fine but I was just venting because it really sucks to spend almost 15k and the people I had to pay don’t even have a simple checklist of things to check before letting a customer leave after pretty much spending enough on a repair to buy another vehicle.
on another note I took my truck to the local guy to have the DPK installed but ask him to check the lift pump pressure first since I did get another low fuel pressure warning. He said it was within ford specs at idle but when they drove the truck it dipped below the spec twice.I just don’t have the cash now to do the DPK and a new lift pump so He suggested changing the lift pump first before installing the DPK to make sure the brand new CP4 is getting the fuel it needs to lubricate the CP4. Wanted $1300 for parts and labor to do the lift pump with factory parts. I said screw that put the FAAS system in instead he had already quoted me $1710 for that to be installed. So now I will have the FAAS sump and pump. It will probably be a month or so before I can do the DPK. The wife is already about ready to kick me to the curb after all the money I Have dropped in the last couple weeks.

 

You’re right there. After dropping 15k I’d expect the senior mechanic or workshop foreman to sign the work off.

 

Good move there... I agree the Fass is better than the factory primary tank pump and since it appears your primary tank pump needs replacement, pay a little more now since you're there and upgrade.

Are they doing the job now?

X2 on spending that kind of money and having the cap left off the primary degas bottle... thats horse manure right there after dropping that kind of money... at a freaking dealership. Plus they missed the low fuel supply pressure. You have every right to be mad.

 

Yes they are doing it now. I expect to get the truck back tomorrow. As I said the DPK is next and then I will be getting her deleted as soon as I recoup from all of this.......... By the way I have a really nice boat for sale now if anyone is interested....

 

No thanks, mine got lost along with my scary rifle collection