CP4 to DCR Conversion

The factory CP4 is the 6.7 Power Stroke's weak spot. We swap it for an S&S Diesel DCR pump before it takes the fuel system with it. No tune needed.

Get a quoteTell us your number and we will call you back.

The 6.7 Power Stroke pump swap

What the conversion covers.

A CP4 to DCR conversion takes the factory Bosch CP4 high-pressure fuel pump off a 6.7 Power Stroke and puts an S&S Diesel DCR pump in its place. The best time to do it is before the CP4 fails. When one comes apart it sheds metal into the injectors, rails, lines and tank, and a one-pump job turns into a whole fuel system.

If your truck is already showing symptoms, tell us when you book so we know what we are walking into.

The factory CP4 comes out and the S&S Diesel DCR pump goes in its place
No tune needed: the DCR works with your truck's existing programming
Already failed? We clean up what the failure reached: injectors, rails and tank
Tell us the year and model when you book so we have the right parts lined up
Ford only, for 30 years. It is the only make we work on

6.7 Power Stroke owners

Swap the CP4 before it takes your fuel system with it.

The 6.7 Power Stroke came from Ford with a Bosch CP4 high-pressure fuel pump, and it is the engine's known weak spot. When one fails it sheds metal into the injectors, rails and tank, and a pump job turns into a whole fuel system. We replace it with an S&S Diesel DCR pump, built to take the fuel we actually run.

S&S Diesel DCR high-pressure fuel pump on the bench at Too-Big Performance in Rocklin, CA — S&S DCR pump, ready to go in

Ford diesel injectors, fuel rails and high-pressure pump laid out at Too-Big Performance in Rocklin, CA — Injectors, rails and pump on the bench

High-pressure fuel pump swap in progress on a Ford diesel at Too-Big Performance in Rocklin, CA — Pump swap in progress

No tune needed Bolts in where the CP4 was and works with your truck's existing programming.
More pump than stock About 25% more volume than the factory CP4.2, fully pressure-lubricated inside.
Made for today's diesel Built to live on low-lubricity ULSD and biodiesel blends.
Already failed? We clean up the whole fuel system: injectors, rails and tank.

Signs it's going: hard starts, long cranking, low power when towing, stalling, fuel rail pressure codes.

Book a CP4 to DCR Swap (831) 254-1974

02 / What We Do

Other Services

CP4 to DCR Swaps

6.7 Power Stroke? Trade the failure-prone factory CP4 for an S&S Diesel DCR pump before it takes the fuel system with it. No tune needed.

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Ford Diesel Repair

No-starts, rough idle, low power, leaks. Ford diesel trucks diagnosed and fixed right the first time.

Injectors & Fuel Pumps

Injector swaps and high-pressure fuel pump upgrades, including S&S Diesel parts, installed clean.

Engine Work

Heads, gaskets, and full teardowns, right up to pulling the cab when the job calls for it.

Diagnostics

30 years on Fords means real troubleshooting that finds the actual cause, so you only pay for what the truck needs.

Maintenance & Daily Drivers

Routine service and repairs on the family Fords too, with good turnaround and fair rates.

Not sure what it needs? Tell us the symptoms →

05 / Get a Quote

Get your Ford
in the shop.

Ford only, 30 years of it

Straight quote before any work starts

Locally owned shop on Placer Blvd, Rocklin

Prefer to call? (831) 254-1974

Book your service

What needs doing?

Year & Model

Ideal Timeframe

Full Name

Phone Number

Anything else we should know?

No spam. We get back to you fast with a plan and a price.

07 / FAQ

CP4 to DCR Conversion, answered.

Is my 6.7 Power Stroke a good candidate for a CP4 to DCR swap?

If it still has the factory CP4, yes. The swap is simplest before the pump fails, because a failed CP4 can take the injectors, rails and tank with it. Send us the year and model and we will tell you what your truck needs.

Do I need a tune after the DCR conversion?

No. The S&S Diesel DCR is built as a direct replacement for the CP4, so it bolts in and works with your truck's existing programming.

What are the signs a CP4 is failing?

Hard starts, long cranking, low power when towing, stalling, and fuel rail pressure codes. If you are seeing any of those, get it looked at before it gets worse.

My CP4 already failed. Can you fix it?

Yes. We clean up the fuel system the failure contaminated, the injectors, rails and tank, and put a DCR pump in place of the CP4.

Will you find what's actually wrong?

That's step one on every job. We diagnose before we replace parts, so you're not paying for guesses.

Do you take on big engine jobs?

Yes. Head work, gaskets, and cab-off repairs on Ford diesel trucks are part of what we do. We walk you through the plan before we start.

How do I get a quote?

Call (831) 254-1974 or use the form on this page. Tell us the year, make, and what it's doing, and we'll get back to you with a plan and a price.