How To Avoid A $10k Repair When Your CP4 Pump Fails!

Dave's Auto Center review

23/7/2025

Car #Car engine #love car #riview car #Riview Car engine

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00:00Ladies and gentlemen, I'm going to dedicate this to the brain damage that we all can have if we're

00:09driving a Ford truck with a CP4 pump on it. The brain damage can be excruciatingly painful. We're

00:16talking north of $10,000 when this high-pressure pump decides to go bad, and they do go bad. Got

00:23comments, why do they go bad? They think our fuel doesn't have enough lubrication in them.

00:28Could be. The fault with that is you're not going to get fuel anywhere else. You could add additive to it,

00:35but I still see them fail. What we're going to do today for this gentleman, he wants to avoid that

00:40$10,000, and I don't blame him, by doing a CP4 pump disaster prevention kit. S&S Diesel sells a great

00:49kit. What this kit does, this disaster prevention kit from S&S Diesel Motorsport, is it's got a

00:57return filter to keep any material that's coming back through the return on this pump when it goes

01:02bad out of the crankcase because it's low pressure going back to the fuel tank. It filtrates that.

01:07It has a return line on it. When this goes on, the CP4 pump, it reroutes the fuel through this plate

01:15so that we don't have mixing of the crankcase low-pressure fuel going to the high-pressure.

01:21That is preventing any crankcase debris from getting to the high-pressure side, which would

01:28contaminate the injector. This little kit here will save you $10,000. You might still get a CP4 pump

01:36failure, but it is not going to wipe out your injector. But what we're going to do today for

01:40you is we're going to show you the step-by-step process of how to replace this thing. Caden,

01:44where are you at? Caden, come on over here. Now, Caden, this is your first disaster prevention kit

01:49on one of these, correct? Yes, it is. Yes, see? And you can tell. Look at his face. He's not kidding

01:55you. This is his first one. I want to show people actually how simple it is to save themselves $10,000

02:00because these kits are not even a tenth of that. Okay? All right. How long is it going to take you to do?

02:07Have you looked at the instructions? Four to five hours? You've got to pull the whole intake off?

02:12Full intake, yeah. And so what might we do while we got that intake up off of there?

02:16Let's talk about that. Check the carbon buildup, all the soot.

02:21Yeah. And we might want to take a bore scope, look down that EGR cooler and see how plugged up that is.

02:26How many miles this truck got on? 97,000. So he's doing this at the perfect time, man.

02:30If you're upwards 80, 100,000 miles on your, well, CP4s are on Dodges, GMs, and Fords.

02:41I mean, they're on everything. That CP4 pump's on everything. And a lot of guys will upgrade

02:46him to a CP3. On the Fords, you can go to a DCR pump, way better pump than the CP3.

02:51You can't do it. There's not enough room on the Dodges and the Duramaxes to do that.

02:57But let's also take a look at all his carbon buildup and see if we can cover some good

03:02maintenance for him while we got this tore down.

03:04Sounds good.

03:05Okay. Get on it, dude.

03:06Okay. First, we're going to take off the turbo inlet pipe.

03:24Next, we're going to take off both charge pipes.

03:26Let's see.

03:49Okay.

03:50All right.

03:51Next, you're wanting to remove this sensor shield, as well as anything that's holding

04:11on to the intake.

04:13So this dipstick, then we'll disconnect the EGR pipe.

04:21With that little shield out of the way, you can get to that top connector.

04:38There's two bolts that hold on the dipstick.

04:40With those removed, you can move it out of the way to get the back bolt for the upper

04:46intake.

04:48Now we want to take off the EGR tube.

04:54That connects from the EGR to the intake.

05:01With those removed, you just need to disconnect the temperature sensor right under this inlet.

05:23With that disconnected, we can just pull out the tube.

05:37That's our first look at what the soot accumulation looks like.

05:45It's not too bad.

05:46You can just see a little bit on the walls.

05:48With that tube removed, we can look inside of the EGR to see if it's clogged up or not.

05:53This one doesn't look terrible at all.

05:55It looks pretty good and free-flowing.

05:58Just disconnecting this tree to give us a little bit more room to play with with the intake.

06:06Now we're going to remove all 11 bolts off of the upper intake.

06:13All right, I've tried a couple of ways on this back passenger side intake bolt.

06:29There's a bracket right here for what looks like a fuel sensor, possibly.

06:40Just makes it really hard to get to this bolt.

06:44Tried a couple of extensions, but it's just in the way.

06:47So I guess we're going to remove that and see if we can get some more room.

06:54So, once I got that little nut off, I'm able to just pry up just a little bit on that bracket

07:14to give us enough room, and now that bottom bolt will come out.

07:21All right, I found out I don't have enough room to remove this upper intake.

07:45So I'm going to unbolt the lower intake, try to sneak it out.

07:49We're going to remove the lower intake bolts.

07:56This PVC tube over here, we've got to disconnect.

07:59There's three tabs that you've got to lift up on.

08:02So now I'm just loosening up the clamp around the turbo for that lower intake.

08:14I'm just going to wiggle it free.

08:18All right, now that's off, I still don't have enough room.

08:23I'm going to take off this throttle body.

08:40It's kind of nasty in there.

08:42I'm going to do that buildup.

08:49I'm going to definitely clean that intake when we get it out.

08:55Yeah, we're going to try to move that fuel filter housing and then see if we have enough room.

09:01That's what we've got to do.

09:17I'm going to definitely put that in my rack, see if the customer wants to clean that out.

09:35Now look how easy, the lower intake comes out.

09:38All right, now the fun begins, you can actually see our CP4 down there, see the quantity valve

09:46down there.

09:47I'm going to make sure there's no metal contamination already and then we'll get to install.

09:53Very quickly before I remove it, I'm going to block off the intakes.

10:01Now I'm going to blow some compressed air just around the sensor so we're not getting any

10:08contaminants whatsoever into that fuel.

10:11Sharing is caring.

10:13There we go, moment of truth.

10:37Nice and clean.

10:44It looks good.

10:45No metal on it.

10:47No sign of the injection pump going out yet.

10:49Okay, we got it all set up.

10:50Got this great kit from S&S Diesel for their disaster prevention kit.

10:56It comes with everything you'll need, hardware, great setup.

11:00I'm going to first start out with the new quantity valve adapter.

11:04It comes with a couple of O-rings that we've just got to install on the bottom.

11:09This will first take place of where the quantity valve used to sit, and this will go right up

11:16the top.

11:17Just going to put a light coat of some lubrication on the seals so they slide in a bit easier.

11:32I'm just going to torque down that to 60 inch pounds.

11:50Okay, we got that quantity valve tube put on.

11:52We're going to go back together, put on that lower and upper intake, and then we'll go and

11:56install the filter.

11:57Dad.

11:58Alright.

11:59Let's see.

12:00We'll see.

12:02We'll see.

12:34Now that we're all back together, we're going to first start with removing a line to add

12:47a new fitting.

12:48This is only needed if it's a 20-20 or a...

12:51So this middle line is what we'll be removing.

12:53I'm going to chop it right off of this hard line.

12:57Alright, I just gently cut against the top with a razor blade.

13:01Prying that plastic bit away.

13:12Now you just slide the new one on and clamp it down.

13:19You want it clamped right in between the two grooves.

13:27Now we're going to assemble the block, just add these two fittings that it comes with

13:31in the kit.

13:34Now we're going to put these rubber isolators on.

13:41Now we're going to put these rubber isolators on.

13:48Okay, now we're going to go back to what we first installed.

13:55We're going to install this red connector one right where we put that new hose.

14:02Then, I'm going to take this top one and put it right where that third connector was.

14:23Now it gave us two new hoses.

14:26This is going to tee into our return back to the tank and our feed line.

14:32So those are just this connector right here.

14:34With that removed, now you're going to insert that male line.

14:40Then you're going to take the second line and just plug it right into the return.

14:48All right, now that we've got those two lines installed, we've got our one back to the tank

14:53on our left and then the feed line to our right.

14:56Now we're just going to install the housing with the filter and they'll be complete.

15:02I'm going to hurry and put the date and mileage of the vehicle as this hasn't had its fuel filter changed right this moment.

15:12S&S says to change it with the factory interval with every 22,000 miles or every third oil change.

15:20So we're just going to calculate that so the owner can just change it whenever that time comes.

15:25Because mine's a 2017 or newer, right here, I'm just going to lift up this little cowl,

15:33plastic retainer that we're going to take out.

15:35And then this is going to be our holding bracket.

15:382016 and older, right here there's a little bracket.

15:41Once you pop up these two trims, you'll mount it right in there.

15:45Just going to put in that spacer down below.

15:48This is our feed line.

15:58And our return.

15:59This is new stuff.

16:01What do you think of the kit?

16:03I think it was pretty easy to install.

16:05Uh-huh.

16:06Once you get down to that.

16:07I mean basically a lot of removing of all this stuff, obviously.

16:10And then the routing, the hookup and everything pretty factory, not a lot of like, didn't fit.

16:16You know how sometimes we get kits?

16:18Oh man, let me tell you.

16:19We get kits from some people and they tell you it's bolt on and it wasn't.

16:24How about this?

16:25What would you rate on this for actually following the instructions and working?

16:29This is...

16:3010 out of 10?

16:31Yeah.

16:32Really?

16:33Seriously.

16:34I need it accurate.

16:35No problem at all.

16:36Plug and play.

16:37Everything was plug and play.

16:38Yeah.

16:39Everything was plug and play.

16:40Shoot, there it is, man.

16:41From a guy that's only done one of them.

16:42That's a pretty good thing.

16:43Usually you do that stuff the first time and, you know, you got to do two or three of them

16:47to figure out how to make it easy.

16:49That says a lot about the kit.

16:50It was well thought out.

16:52All right, man.

16:53Guy's just saved himself a disaster.

16:55So let's hear it, man.

16:59Oh, wow.

17:02Nice.

17:03I'm sure you've looked for leaks and things that are rubbing or anything like that and

17:07you're happy with it all?

17:08Yeah.

17:09When you had the intake off, did you bore scope the...

17:13I did.

17:14The EGR core?

17:15You did?

17:16I did.

17:17Dude, you're so good.

17:18And what was your findings on the intake?

17:20How did it look inside there?

17:21Intake was a bit grimy right here in the front, so we cleaned that out.

17:25But as far as EGR cooler, there's no buildup.

17:28Cool.

17:29Now look, has he still got the original QR codes on that crankcase breather?

17:34Yeah.

17:35Now what's that tell you?

17:36It's never been replaced.

17:38Yeah.

17:39And you got a hundred and how many thousand on this?

17:4197,000.

17:42You know, this is it.

17:44What did I just do for you, dude?

17:46I just was building you up and then I just pimp slapped you.

17:49The point of that was, that sure would have been easy to replace while you're back in

17:54there, huh?

17:55Yeah, it would have been really easy.

17:56Yeah, so again, a little tip on your crankcase breather filter right there.

18:02Those are the QR codes, quality injector codes for the injectors.

18:07If you got a crankcase breather that's still got that tag on there, that means you still

18:12got the original breather.

18:13And with a hundred thousand miles, it ought to be replaced.

18:16Anything else?

18:17I'm glad you looked at the EGR.

18:18You did good.

18:19But you could have done better.

18:20Okay?

18:21Okay.

18:22All right, man.

18:23Thanks.

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