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Diesel Died

Adventure_JTRD

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I have a '22 Rubicon Diesel with 22k miles. It taken me through 8 states and a week long solo trip through Canada and first time ever having an issue with it.

I was leaving the store on Saturday and when i went to go from a stop sign, it went and about 100 feet after it started to make a rattling noise. Thought maybe it was my transmission, so popped it in N and then P and back to D and it started to rattle/studder and then died. Once it stopped on the side of the road i tried to start it back up and it was turning over but wasn't starting. Thought may be the battery was dying and hooked up my jumper box to it, but it had enough power to still crank over but never actually start. Then i guess i tried to start it one too many with fails and the system warning stated that it went into starter protection mode. Once i got my brother to give me a tow to the parking lot and out of the road, we checked the fuel and there was no water in it. It was pouring rain here in CA on saturday so maybe thought it had to do something with that but all my electronics were fine and no CEL or other lights were on. Also pulled the gas line to the engine and cranked it over and gas was squirted out, so it seems like it was getting gas or at least the system was priming itself. But still nothing. While waiting for the tow truck, i got some def as it was about 1/4 full and got the warning to fill up or it won't start in 310 miles, figured i would at least remove that possibility out of the equation, but still no luck. The engine would turn over but not start.

Tow truck driver tried to start it when they got there about an hour after the whole deal started, and nothing. Same thing, it would crank over fine but not start. He said sounded like the fuel pump. I got it to the dealer and of course they were closing early since it was NYE. Dropped it off and they called yesterday morning saying that they probably won't be able to look at it for at least a couple of days..... yay.

I know that there is the CP4 pump recall, but my jeep isn't listed on the recall. I picked it up on April 27, 2022 and it sounds like i am a victim of the CP4 failure.
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Free2roam

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Sorry to say but I imagine you are.
 

Jefe1018

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From the symptoms you are describing, it would not be too far fetched to believe that your CP4 did go out. Sorry your truck is currently down.

I'm curious, did you ever run any sort of fuel additive like hot shots?
 
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Adventure_JTRD

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From the symptoms you are describing, it would not be too far fetched to believe that your CP4 did go out. Sorry your truck is currently down.

I'm curious, did you ever run any sort of fuel additive like hot shots?
I did run it a couple of times, but unfortunately i haven't been as constant with it.
 

Sandevino

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I had the same issue a week and a half ago. Started, ran, died then would crank for days. I got a fuel pressure code and finally got it started and limped to the dealer. TSB 18-175-22 was applied and it’s been solid since - 2 weeks and nearly 1000 miles. The CP4, pump, limes etc were fine.

Your mileage may vary but this is what fixed mine.
 

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Adventure_JTRD

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I had the same issue a week and a half ago. Started, ran, died then would crank for days. I got a fuel pressure code and finally got it started and limped to the dealer. TSB 18-175-22 was applied and it’s been solid since - 2 weeks and nearly 1000 miles. The CP4, pump, limes etc were fine.

Your mileage may vary but this is what fixed mine.
You're lucky you were able to limp it to the dealer. i was not able to get it throw any codes or even start so i had to wait for a tow into the dealer. Now i have to play the waiting game with them and see if it is the CP4 and if they have one or how long it will take for it to arrive. Not the way i was hoping to start 2023
 

Jteakus

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I sure hate to hear about your bad luck. Please keep us posted as to what the dealer figures out.
 

WTR

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one bit of advice after you get your new pump (if that is in fact the problem); USE FUEL LUBRICANT REGULARLY.
 

Rusty PW

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I had the same issue a week and a half ago. Started, ran, died then would crank for days. I got a fuel pressure code and finally got it started and limped to the dealer. TSB 18-175-22 was applied and it’s been solid since - 2 weeks and nearly 1000 miles. The CP4, pump, limes etc were fine.

Your mileage may vary but this is what fixed mine.
What is that TBS on?
 

Sandevino

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What is that TBS on?
Not sure. This was what was on the repair order. I’m talking with the shop later this week and hope to find out.
 

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Adventure_JTRD

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Dealer said that they are going to look at it tomorrow finally. So hopefully they are able to diagnose the issue and get the parts on order.
 

Diesel Sting

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Did you happen to notice a MPG decline before this happened?
I'm at almost 23K miles and this tank has been the worst on MPG since I've had the truck. Think I'm right at 19.7ish, when I usually get 23MPG. I have run 37's since 900 miles and have always been around the 23MPG mark.
 

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Did you happen to notice a MPG decline before this happened?
I'm at almost 23K miles and this tank has been the worst on MPG since I've had the truck. Think I'm right at 19.7ish, when I usually get 23MPG. I have run 37's since 900 miles and have always been around the 23MPG mark.
Is that all or mostly highway? I get about 18-19 usually around town which is the majority of my driving but roughly 22-24 highway.
 

Diesel Sting

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Is that all or mostly highway? I get about 18-19 usually around town which is the majority of my driving but roughly 22-24 highway.
It is mostly highway, I don't see too much city driving. If I do it's not many miles.
 
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Adventure_JTRD

Adventure_JTRD

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Did you happen to notice a MPG decline before this happened?
I'm at almost 23K miles and this tank has been the worst on MPG since I've had the truck. Think I'm right at 19.7ish, when I usually get 23MPG. I have run 37's since 900 miles and have always been around the 23MPG mark.
No noticeable decrease in MPG. I've been hovering around the 20-21MPG. There maybe was a slight drop but that is because i finally updated my computer to recognize the larger tires.
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