Semi-Long term parking

[Adventure_JTRD]

The last time my gladiator had issues with the fuel system, the dealer was not able to recreate or determine the cause. They just said that they suspect that there is bad diesel in the tank, however, they did never tested it and wanted a couple grand to drop the tank and dispose of the diesel. So, I got a daily driver and took my gladiator home and got the diesel tested by Blackstone Labs, which everything came back perfectly fine. Now, since Nov. 2024, my gladiator has been sitting in the driveway, and only gets driven occasionally around town and haven't taken it on any trips since because of the issues in the past. I am planning on taking it on a trip next week and some other trips towards the end of the year.

Are there any recommendations for our diesels to ensure that sitting for extended amount of time won't cause any issues with the diesel and fuel pump? I have already had the fuel pump replaced 3 times, so trying to do whatever I can do to prevent any further fuel issues.

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[Free2roam]

How long does it sit? Mine sat for 23 days if I had a battery tender I wouldn't have had to jump it. Other than that I've had no issues with it sitting.
Edit:
Using Hot Shots EDT or XPD by Opti-Lube doesn't hurt either.

 

[Mr Miami]

Sorry I have nothing intelligent to add (my JT is the V6) but I had to re-read the title of your thread several times wondering why would he be asking here on this site about parking an 18 wheeler at the airport.

 

[DJPodratz]

Can't help diesel bro, but I have left my gasser sitting for 4-6 weeks a couple of times. Never a problem with fuel or battery.

 

[Pips_the_JT]

The last time my gladiator had issues with the fuel system, the dealer was not able to recreate or determine the cause. They just said that they suspect that there is bad diesel in the tank, however, they did never tested it and wanted a couple grand to drop the tank and dispose of the diesel. So, I got a daily driver and took my gladiator home and got the diesel tested by Blackstone Labs, which everything came back perfectly fine. Now, since Nov. 2024, my gladiator has been sitting in the driveway, and only gets driven occasionally around town and haven't taken it on any trips since because of the issues in the past. I am planning on taking it on a trip next week and some other trips towards the end of the year.

Are there any recommendations for our diesels to ensure that sitting for extended amount of time won't cause any issues with the diesel and fuel pump? I have already had the fuel pump replaced 3 times, so trying to do whatever I can do to prevent any further fuel issues.

My Jeep only sits for a few days at a time, but I have a boat with a Yanmar diesel and we only use it every 2 or 3 months so we had problems a couple of times with the fuel and clogged filters. Since then I've used both Sea Foam and Diesel Kleen w/o issue so those would be what I'd recommend.

 

[GoatPowder]

Had mine sit for 7mo while debating if it went back to stock and got turned in (was already way over mileage). Decided to buy it, threw a jump pack on it, and the wife has been daily driving it since.

While it was my daily I was syphoning 1 year old+ diesel out of dead trucks and running it. Diesel can and does "turn", as in it can get algae or water /contaminated but overall it's pretty stable. Just throw a fresh fill in the tank and you'll be fine.

Given your luck with the HPFPs I'd cycle the key a few times to prime the system before a start after sitting... But damn, 3? They are clearly missing something that's causing your failures.

 

[DJPodratz]

My Jeep only sits for a few days at a time, but I have a boat with a Yanmar diesel and we only use it every 2 or 3 months so we had problems a couple of times with the fuel and clogged filters. Since then I've used both Sea Foam and Diesel Kleen w/o issue so those would be what I'd recommend.

I too had a boat (mine was a gasser) with an Atomic 4 (30 HP four cylinder). 35 years old and it sat one entire sailing season. Had to do a carb replacement. As long as I treated the fuel, never a problem over the winter over decades of ownership.

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