Pump went out again

[Adventure_JTRD]

Well it's back at the dealer again.

It died on me yesterday when I went to drive it after being out of town for 2 days. It started up fine. After starting up and driving down the street it started to make the claddering noise and studder and died while in motion. I was able to restart it and it still claddered and studder for a bit and it eventually stopped doing that and was able to drive it back home. This time I took video of the noise and what it was doing since the dealer was not able to recreate it last time.

This morning I went to drive to the dealer to have them look at it and then again about 5 minutes after starting up, it died again while in motion. Same thing, was able to restart it and get it to the dealer.

Showed the service manager the video and he said that he hasn't heard of anything like this. They are going to look at the video and do some more testing. But they have no clue what is going on.

It appears to happen within a short period of time of starting up after sitting overnight or for a long period of time.

The video is too large to post on the forums, but will upload it so you guys can see/hear whats going on.

At this point, if they can't figure it out, I might start the buyback and possibly get a new 2023 or go a different route. Don't want to get rid of the diesel gladiator but this one is getting less and less reliable.

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[DylanM]

Sounds to me like the HPFP isn't the problem since the vehicle will at some point recover and run normally. Rather, something is intermittently restricting fuel flow between the tank the the HPFP. Can you hear the lift pump in the tank come on when you turn the ignition on, engine off? When's the last time the fuel filter was checked or replaced?

 

[Adventure_JTRD]

Sounds to me like the HPFP isn't the problem since the vehicle will at some point recover and run normally. Rather, something is intermittently restricting fuel flow between the tank the the HPFP. Can you hear the lift pump in the tank come on when you turn the ignition on, engine off? When's the last time the fuel filter was checked or replaced?

Yeah everytime i start it up, i wait to hear the hum before fully starting it up just to make sure that it is engaging. Fuel filter was checked/replaced last time it was in the shop last month for the same thing. They tested all the fuel system and the diesel in the tank and everything came back with good pressure and good lab results on the diesel.

 

[TheSolarWizard]

this is wild my jeep just ticked over 41k miles and its been beaten.

before a couple weeks ago I had never had any issues beside a defective seat cushion. One previous CEL for low oil pressure was due to a defective oil filter I'd install.

I got P026C CEL after being forced to buy some B20 and thought my luck had finally run out. filled with R99 was still there. swapped in a new air filter and problem gone.

makes me nervous seeing some people having issues still

 

[Adventure_JTRD]

this is wild my jeep just ticked over 41k miles and its been beaten.

a couple weeks ago I got P026C CEL after being forced to buy some B20 and thought my luck had finally run out. filled with R99 was still there. swapped in a new air filter and problem gone.

makes me nervous seeing some people having issues still

I have just over 45k miles on and have taken on a lot of trail and long road trips and never had any issues. Not even a CEL or anything. This has been the only issue and it appears to be getting more and more frequent. Which is why i am debating on doing the buyback and maybe getting a newer 2023.

 

[Badunit]

I may have missed it but what leads you to believe the problem is the HPFP? It is just one possible cause but not the only one. If it is the HPFP, it is highly doubtful it is "blown" if it clears up and runs. Metal shavings being pumped into injectors kills them dead.

What codes is it throwing?

 

[Adventure_JTRD]

I may have missed it but what leads you to believe the problem is the HPFP? It is just one possible cause but not the only one. If it is the HPFP, it is highly doubtful it is "blown" if it clears up and runs. Metal shavings being pumped into injectors kills them dead.

What codes is it throwing?

When the pump went out the first time back in 2022 (which was confirmed it disintegrated and sent debris through the system and wouldn't start up, just crank and crank), the symptoms were exactly the same. Driving fine and then start to studder and died. These last 3 times, were the same symptoms and it will crank and crank for a bit. But once letting it settle down, it will eventually start up and studder for a bit until it smooths out.

There is no codes it throws. And nothing stored in the computer when they connect to it. It will just start to studder and die. And when the first pump went out, it did not throw any codes either.

 

[Vtur]

I don't know what it is, but it sounds like it happened whenever the engine warmed up?

 

[Adventure_JTRD]

I don't know what it is, but it sounds like it happened whenever the engine warmes up?

It has been pretty consistent with happening around 5 minutes of starting up. But it is random on when it will do it. It was fine for the last couple of weeks and then yesterday and today it did again. And nothing has changed. Same gas station, using EDT, and warming up before driving away in the mornings.

 

[Vtur]

How about lesson to the sound of the hpfp when first start up and than again when it studder. Using a long screw driver or metal rod method.

 

[Adventure_JTRD]

How about lesson to the sound of the hpfp when first start up and than again when it studder. Using a long screw driver or metal rod method.

If the studdering was predictable and could listen to it then, that could be an option. However, since it is random and cannot be force recreated, it would be difficult to compare the two.

 

[DylanM]

When the pump went out the first time back in 2022 (which was confirmed it disintegrated and sent debris through the system and wouldn't start up, just crank and crank), the symptoms were exactly the same. Driving fine and then start to studder and died. These last 3 times, were the same symptoms and it will crank and crank for a bit. But once letting it settle down, it will eventually start up and studder for a bit until it smooths out.

There is no codes it throws. And nothing stored in the computer when they connect to it. It will just start to studder and die. And when the first pump went out, it did not throw any codes either.

Precisely, if the HPFP was the cause of your issues then the engine would not start again nor simply stutter then clear up. If the clattering noise is indeed coming from your HPFP when you're having the stuttering/power loss issue, it's because fuel flow to the HPFP is being interrupted, ie, you're hearing the pump cavitate.

 

[Adventure_JTRD]

Here is video from yesterday when it happened.

 

[Vtur]

Sounds like the turbo is trying to build boost then leaks. Maybe sticking solenoid? Highly doubt that it's the hpfp.

 

[Adventure_JTRD]

Precisely, if the HPFP was the cause of your issues then the engine would not start again nor simply stutter then clear up. If the clattering noise is indeed coming from your HPFP when you're having the stuttering/power loss issue, it's because fuel flow to the HPFP is being interrupted, ie, you're hearing the pump cavitate.

That could be it, and i am just going off from prior expernince and symptoms of when the pump first went out. Since they were identical, other than being able to restart. Even, then the pump could be failing and just not at the point of total failure. Per the dealer and Jeep, everything for the fuel system is in good shape from what they can tell (fuel pump, pressure to and from the pump, fuel filter, diesel in system, etc.). It's at the dealer now and they have the videos that i took of when it was happening, so hopefully with that they are able to determine what is going on.

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