KAAAAPOOOOOWWWWW!!!!!

[Eternity]

Everyone is focused on the batteries and I suppose missing my posts.

Rather than arguing over the batteries, which cranked the engine a good 5 times after the whole scenario started. Kaapppooww was my Batman reference as to how this hit me...not the sound it made. Perhaps nobody is old enough to recall seeing those words in bold flash across the TV screen.

Please, would you all consider the possibility that my new conclusion is perhaps correct and fits everything I stated at the start:

Diesel Gladiator '21 has a RECALL on the fuel pump. According to the recall, it can suddenly die causing the engine to stop and possible loss of control...therefore a recall.

The electronics on my car did not die when driving. The engine has a slight "bump" with the sound....which if the fuel pump suddenly broken, could be an interruption in fuel and hiccup in the power I felt. Then a few seconds later, it sputtered...as if being fuel starved, not a sudden loss of power.

Perhaps we could have the conversation consider if this is a reasonable explanation for everything I experienced and the battery was just secondary to my trying to get it to start after dying in the middle of the road.

Finally, I've driven this many times down to a gallon without a problem. This was a straight and level road in a small town, no accelerating or braking, cruising at about 30mph gently to the gas station a few more blocks away. This scenario was so shocking and unexpected that it felt like Kaapppooowww!!! Right in the kisser.

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[ShadowsPapa]

That would be fine but you used the word for an explosion or gunshot, then said that's what it felt like.
So don't use the kapow or say that's what it felt like. You instantly brought in the battery bits.
We really only had what information you provided in the initial post - which was suggesting it was akin to a shot or explosion and along with it, battery issues.

So after playing 20 questions it looks like you weren't very clever running it really low on fuel with a well-known fuel pump issue, knowing that fuel pump issue could wipe out the rest of the fuel system, kept trying to start it (and in the mean time, making excuses for the battery issues - doesn't matter if the battery is 1 week or 1 year old - failure happens, especially with a modified system)

Kapow - that is what it felt like. Then you talk about having battery issues in the next sentence.
Battery/voltage issues can cause these to shut down in self-preservation mode. I'd bet that's exactly what a few others were seeing - it stopped, wouldn't start, the battery was dead, and you had made mods.

Those were the first things we saw.
Sorry, maybe leave side things out next time. Be very clear, and give all related information to the actual problem in the first paragraph.

 

[Deleted member 57233]

Finally, I've driven this many times down to a gallon without a problem.

This won't be your last fuel pump issue if you keep that up.

 

[Eternity]

This is my official apology to everyone who was triggered by my use of the word Kapow!

Really thought that was going to be humorous and not that everyone would turn to a dictionary to understand exactly what I felt. For those old enough to remember Batman (which is the only place I have ever seen that word in my whole life), enjoy the thread tangents.

I will be very careful to never, ever use the word Kapow! or BAAMM! or WHAMY!!! OR BOOOM!!!! on this forum. But, perhaps some Googling those words will get a kick when it brings them to this forum.

I wrote exactly what happened in the order it happened with as much detail as I could. I didn't leave out the battery problems I was having in case others had a similar scenario. The extra battery delete is a popular mod that many have and continue to do without an issue. Using it as a built in battery jumper is a clever mod that works and will continue to work since it appears, NOW, AFTER MORE HAVE CONSIDERED OPTIONS, it has nothing to do with the batteries, it is covered under Recall including any debris in the fuel or any other related damages.

To make everyone in the Jeep community comfortable, I will never run with less than 5 gallons of gas in any place I ever go. FYI...the pump doesn't automatically explode if you run dry. Can cause premature wear, but doesn't mean you instantly need another one.

My cost will be $200 tow to the dealer. They will cover everything else under the recall.

Thanks for the input. I'll be very, very careful not to use any references older than circa 2000 in the future. I sure miss Click and Clack, the Tapit brothers. Wonder if they would have figured it out from the start. Sorry!! Too old a reference?

 

[ShadowsPapa]

I sure miss Click and Clack, the Tapit brothers.

Don't get me going on those morons. We showed how little they knew about brakes and certain other things more than once. Hope few listeners really took them seriously

The extra battery delete is a popular mod that many have and continue to do without an issue.

Yeah, a lot do it, a lot don't, but you don't see people figuring on using a voltage triggered relay to keep it around for use later. That's asking for issues since you can easily reconnect a failing battery together with a good one and blow fuses or do other nasty things. They are intended to be in parallel at all times (like the factory does) or disconnected completely like almost anyone doing the delete does - disconnect negative, LEAVE it disconnected, pull fuse F42 to prevent error lights.
Your batteries will age and charge at different rates - suddenly connecting it back in can be trouble. I'd bet that's what REALLY blew that N3 fuse, not attempting to use a jump pack.
If one battery was fully charged and the other at 50% and you hook them together regardless of the means- solenoid or otherwise, you can blow that fuse.

I've been down this path so many times.
You can't connect new and old batteries together and not expect a fuse to go, especially if one is always in the system and the other not always.
I'd bet the blown fuse was a result of how things are configured, a difference in battery age and different SoC and SoH.
Clever is doing the delete, and carrying a jump pack and leaving that aux battery out of the equation, or, leaving it all alone since it doesn't normally cause trouble (unless you keep letting voltage get down to 12.4 - half-discharged, and assume the alternator is a battery charger.)
Buy a decent jump pack and put a battery charger on that crank battery.
Otherwise, a blown N3 may be in your future again.

50 years in auto-electric systems (and some electronics experience at CCC), I'd never do such a system with a mix of batteries.

 

[OldButStillJeeping]

From a former owner of a couple diesel 3/4 ton trucks, and it was already mentioned.....

1 gallon of fuel left? Are you serious? How did that happen? AND... How do you know there was 1 gallon left? Was it showing a half inch below empty on the dash guage?

You probabaly fried the fuel pump.

Nobody runs them to empty.

Get fuel when it hits 1/4 tank.

This smells bad. From "I had 1 gallon of fuel..... " and goes south...

"Empty don't mean squat... I guess there's a gallon in her. So, it was either put fuel in the Jeep or go to the bar. My paycheck gets deposited tomorrow... so the bar it is"!

 

[ShadowsPapa]

AND... How do you know there was 1 gallon left?

LOL - I had wondered that. Mine never says "you fool, you have ONE freakin' gallon left!" - only miles and that's not a great way to KNOW what's left in the tank

 

[Lost1wing]

Running a low tank is one of the main killers of the CP4 pump. Air gets into the system (even if you don't notice it), whether it be from fuel moving around and exposing the pickup or from fuel sloshing around and foaming. Air pockets cause plungers to shift which leads to excessive wear, excessive wear causes excessive play and eventually leads to mechanical failure.




The CP4 recall is across almost all modern diesels, not just Jeep, so it is an accurate statement that dealerships can't easily get parts and will prioritize failures or higher mileage over anyone else. And yes, they are replacing with the same pump as there is no upgraded or "fixed" CP4 replacement. There are some companies that sell a in-house modified pump that they claim are less likely to fail, and if they do they won't send metal into your fuel system. Since you tried to start and run your truck a few times after pump failure, chances are they'll need to replace quite a bit as you likely circulated contaminated fuel throughout your system.

For any other diesel owners reading this, I suggest you read up on CP4 failures, steps you can take to mitigate your chances of it happening, and what to do if it does happen so you don't make matters worse, but for cliff notes;

Only run top-tier fuel from stations that see a high volume of diesel traffic
Always run a lubricant additive in your fuel
Change your fuel filter regularly
Never run your tank close to empty
If you suspect pump failure DO NOT try to start the engine

I wish my cp4 was recalled. I'm a Kaboom/Kaapoow waiting to happen. I have a cp3 option if I get off of my kiester.

 

[JTdiRtyD]

To make everyone in the Jeep community comfortable, I will never run with less than 5 gallons of gas in any place I ever go. FYI...the pump doesn't automatically explode if you run dry. Can cause premature wear, but doesn't mean you instantly need another one.

You're partially right, MOST fuel pumps won't "explode" if you run them dry, but the CP4 is KNOWN to literally explode if run dry. Take apart a CP4 after failure and the internals come come out in pieces. The plungers rely on fuel to keep them lubricated and centered in the cylinder they run in. loss of fuel/air pockets will leave excessive wear and rough edges in those cylinders and cause them so shift and bind.

 

[Lost1wing]

If you do end up having it towed to a dealer, be ready for them to squawk at switch that you have installed. They may not want to play with your batteries if you modified it.

 

[red/green hawk]

This is my official apology to everyone who was triggered by my use of the word Kapow!

Really thought that was going to be humorous and not that everyone would turn to a dictionary to understand exactly what I felt. For those old enough to remember Batman (which is the only place I have ever seen that word in my whole life), enjoy the thread tangents.

I will be very careful to never, ever use the word Kapow! or BAAMM! or WHAMY!!! OR BOOOM!!!! on this forum. But, perhaps some Googling those words will get a kick when it brings them to this forum.

I wrote exactly what happened in the order it happened with as much detail as I could. I didn't leave out the battery problems I was having in case others had a similar scenario. The extra battery delete is a popular mod that many have and continue to do without an issue. Using it as a built in battery jumper is a clever mod that works and will continue to work since it appears, NOW, AFTER MORE HAVE CONSIDERED OPTIONS, it has nothing to do with the batteries, it is covered under Recall including any debris in the fuel or any other related damages.

To make everyone in the Jeep community comfortable, I will never run with less than 5 gallons of gas in any place I ever go. FYI...the pump doesn't automatically explode if you run dry. Can cause premature wear, but doesn't mean you instantly need another one.

My cost will be $200 tow to the dealer. They will cover everything else under the recall.

Thanks for the input. I'll be very, very careful not to use any references older than circa 2000 in the future. I sure miss Click and Clack, the Tapit brothers. Wonder if they would have figured it out from the start. Sorry!! Too old a reference?

No apologies needed. Some people on this forum feel the need to whip their d!cks out on the internet any chance they get...

 

[OldButStillJeeping]

No apologies needed. Some people on this forum feel the need to whip their d!cks out on the internet any chance they get...

Yeah OK. Lol

Most don't care if the OP called it KaBoom or ShaZaam. A mild bomb going off or a 1960's caped crusader punching the Joker or Riddler... et al.

I just can't understand why the OP would run it down to "One gallon"? And how the OP knew that it was "One gallon left".

Respectfully; If you can own an expensive Jeep JT you should fill it up at the 1/4 tank mark.

Either the JT was a free gift and you can't afford fuel, or you maybe should fuel up sooner.

I don't have too much compassion for fools.

Running it down to "1 gallon" is foolishness.

Please help! I ran my tractor out of gas and something bad happened! Bang. It quit. What do I do?

Try filling it up when it hits 1/4 tank left. It's not brain surgery.

 

[ShadowsPapa]

Most don't care if the OP called it KaBoom or ShaZaam. A mild bomb going off or a 1960's caped crusader punching the Joker or Riddler... et al.

Yet there is an obvious implication that several picked up on right away - loud bag/pow/explosive sound..
When seeking assistance in troubleshooting - stick to what happened, but do give all facts as leaving out things means we play 20 questions.

It only complicates things bring in unrelated things, or leaving out information.
Do you visit the doctor or call the doctor and start out the way some do?

If it was a gas engine, believe me, some would instantly say "it backfired then died"

 

[OldButStillJeeping]

Yet there is an obvious implication that several picked up on right away - loud bag/pow/explosive sound..
When seeking assistance in troubleshooting - stick to what happened, but do give all facts as leaving out things means we play 20 questions.

It only complicates things bring in unrelated things, or leaving out information.
Do you visit the doctor or call the doctor and start out the way some do?

If it was a gas engine, believe me, some would instantly say "it backfired then died"

I understand, the OP is here for help. He calls it " Pow or Shazaam" or whatever.

Then he details the issue. "So. I had One gallon of fuel left". On a diesel!!!

End of story.

You can't help stupid.

I am now a farmer. In 2022 we had a couple blizzards come thru. -16 degrees F. My neighbors tractor quit running... my tractor ran fine.

He was running summer diesel!

I put in a quart of diesel winter supplement in his tank. I said give it 24hrs.

It started up and ran perfectly the next day.

Ignorance can be fixed. Arrogance takes work. Defining the 2... is usually simple.

I have a bit of both in me. We all do. I am trying to help the OP. Just like most of you.

 

[Freems]

Actually, that reminds me of a recall. There is a fuel pump recall on the Jeep. When I got the notice a few years ago, I called the dealer and they already knew what I was going to ask for as if all diesel owners were calling that day. He said the parts are not available and no idea when. Call a year later and the same thing.

That could explain the clunk sound and then fuel starvation shortly thereafter and unable to start or stay running. That also could have blown the fuses, perhaps? Did order the main fuse to the PDC....there was one that was blown.

Thanks for all the ideas and jogging my memory. Now to figure out how to get it to the Jeep dealer.

Tow it behind the motorhome

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