After the recent videos from S&S where they intentionally failed their CP4 pump with their S&S kit installed and it ran another 150+ miles, I ordered one to put on my 2011 6.7. I got the Gen2.1. There was a lot of discussion around if these kits even worked and no one ever seemed to have a solid story. Im guessing because most people that proactively maintain their vehicles use additives and fill up at nicer/more frequented stations to lessen the chances of getting debris to the CP4.





I am curious if there are others on the forum that have installed these on their trucks.

Gen2.1 6.7L Ford Power Stroke CP4 Disaster Prevention Kit (2011+) - S&S Diesel Motorsport (ssdiesel.com)

Seems like cheap insurance over replacing a whole fuel system for what most people on the internet are saying is 10k+

I put one in my 2016 F450 after catastrophic pump failure. Luckily my insurance company covered the $20,000 complete fuel system replacement Ford wouldn’t warranty it, because they said it was due to bad gas.

Bad gas? i'd love to hear an explanation of how bad gas caused that damage.... i can see melted pistons from detonation....but debris like that what they got above in the videos....no way. Im not a diesel guy so maybe there is something that could cause it but i just dont see it...

Ford claims that the “bad gas”, which usually means water in the fuel causes the high pressure pump to rust and eventually grenade itself, sending metal shavings through the entire fuel system. Clogging injectors, back into the fuel tank through return line, etc…. The entire fuel system needed replacing. Luckily my insurance company agreed it was not due to my fault and covered the cost

CP4 failed in my Duramax a few years ago. I have no clue exactly what the culprit was but bad fuel (water in it) is a big possibility. Water = less lubricant.
Done a lot of reading about the CP4. Countries with higher sulfur diesel (more lubricant) had less CP4 failures. When the CP4 does not have enough lubricant, it implodes and contaminates the fuel system. I bought a CP4.2 disaster kit. Replaced and flushed everything myself. So much metal in my fuel tank. I had about 40 hours in the job. If I had to do it again, probably a 25 hour job. I’m not a mechanic btw. The dealers charging $10k+ is very outlandish.

I haven’t checked recently but I don’t think they make that kit for a Duramax. I think it’s a small price to pay to likely help the situation.
I feel a lift pump is a good aid. They are suppose to remove water and air from your fuel. Mine had one before the failure tho.

I’m on year 3 after the failure. I change my filters twice as often and add optilube to ever tank.

Happened in August near my dad’s house. His garage is always occupied so had to do it all outside.
Metal on the fuel pressure regulator tells you what happened.

MUST use lubricity additives in diesels from new as mentioned above the US supply is very dry.

yes bad fuel is the main cause of these pumps grenading. As diesel fuel is used as a lubricant. So when there is water contamination ect the pump is not getting the proper lubrication and you’ll start getting micro metal shavings till the pump goes boom. And you’re in the hole 20k for a fuel system. Always use quality fuel, don’t fill out the job site tanks L tanks ect. Fuel Additive, change fuel filters & drunk water separator regularly