3.0 won’t crank

Robbyreneeward

Well-Known Member
First Name
Robby
Joined
Sep 10, 2020
Messages
213
Reaction score
169
Location
Texas
Vehicle(s)
2008 Dodge Ram 2500 Megacab
It’s cold here in TX. -2 with a wind chill of -12 when I got up. He won’t crank. Never owned a diesel vehicle before. Any help? Open carport. Not a garage.





Advertisement

 
OP
OP
Robbyreneeward

Robbyreneeward

Well-Known Member
First Name
Robby
Joined
Sep 10, 2020
Messages
213
Reaction score
169
Location
Texas
Vehicle(s)
2008 Dodge Ram 2500 Megacab
could be 100 different things. Need more info. Provide as many details as possible. What are you seeing? What are you hearing? Did you plug in a block heater?
It’s wanting to turn over but won’t fire up. No block heater. Battery has juice from What I can tell. It was in this colder weather all night.
 

Capricorn

Well-Known Member
Joined
Apr 1, 2018
Messages
419
Reaction score
178
Location
Las Vegas, NV
Vehicle(s)
Jeep Wrangler JL Willys Unlimited 2021 3.0L EcoD, Dodge Durango R/T 2019
Occupation
Network Architect & Engineer
Sorry to hear.
Could be many things, and hopefully transient issue which is just low temps related.
Possibly fuel may have gelled up most likely?
 
OP
OP
Robbyreneeward

Robbyreneeward

Well-Known Member
First Name
Robby
Joined
Sep 10, 2020
Messages
213
Reaction score
169
Location
Texas
Vehicle(s)
2008 Dodge Ram 2500 Megacab
I think your fuel might have gelled up.
I’m almost positive that’s what it is. Any idea what I can do to remedy the issue? Besides the ambient temp outside be above freezing? Lol
 

neil

Well-Known Member
First Name
neil
Joined
Sep 21, 2020
Messages
679
Reaction score
741
Location
Dallas, TX
Vehicle(s)
20 JLUR, 21 JLUR and others
Build Thread
Link
Is there a glow plug that u can let cook a little longer?

idk this engine but my diesel Benz has a plug

this weather is tough on everything!
 
OP
OP
Robbyreneeward

Robbyreneeward

Well-Known Member
First Name
Robby
Joined
Sep 10, 2020
Messages
213
Reaction score
169
Location
Texas
Vehicle(s)
2008 Dodge Ram 2500 Megacab
Is there a glow plug that u can let cook a little longer?

idk this engine but my diesel Benz has a plug

this weather is tough on everything!
Don’t know where it would he. I’m at work now. Gonna see what I can find online
 

calemasters

Well-Known Member
First Name
Allen
Joined
Sep 14, 2020
Messages
511
Reaction score
476
Location
Springfield, Mo.
Vehicle(s)
2021 Rubicon Unlimited, & Escalade
Occupation
Retired Mechanical Engineer
It’s cold here in TX. -2 with a wind chill of -12 when I got up. He won’t crank. Never owned a diesel vehicle before. Any help? Open carport. Not a garage.
I am sure your #2 diesel fuel is winterized. Also, the water/fuel separator has a heater for the fuel to prevent gelling. You can add the Mopar premium diesel fuel treatment as well.

However, fuel gelling does not prevent the engine from cranking. It prevents it from starting. You said it will not crank in your subject title. Since you do not have an engine block heater, you can get a heater that inserts into the engine oil indicator adapter tube (dipstick) to warm your engine oil overnight. But most of all, connect a battery charger to your main battery. Not a battery tender, a battery charger. But make sure the charging voltage is no greater than 14.4 volts, or you could damage your auxiliary battery. You should also test your battery to make sure it is still viable, otherwise it will not hold a charge
 

toolaide4fit

Well-Known Member
First Name
Tom
Joined
Jul 2, 2018
Messages
1,076
Reaction score
1,541
Location
Waxahachie Texas
Vehicle(s)
2020 Jeep Wrangler Rubicon Diesel, 2016 Mercedes C450 AMG, 2014 Mercedes ML-350 Blutec, 2005 Heritage Softail
Occupation
IT Manager
I had the same issue! Mine did crank and started for a couple of seconds. I raised the hood let the sun warm it up. Got an indication I had water in my fuel filter. When it started I drove around a bit and moved one of my benz’s outside and the Jeep in. All is good now. I do NOT have the block heater cable for my Jeep.
 

Compression-Ignition

Well-Known Member
First Name
Roy
Joined
Nov 12, 2019
Messages
725
Reaction score
742
Location
Eastern Washington
Vehicle(s)
2020 JLUR 3.0 Diesel (FIRECRACKER RED), 2020 6.7L F350, 2011 QX56, 2005 5.9 Cummins
I'd assume a battery issue. But if it isn't, try pushing the start button with your foot off the brake to cycle the engine start process. What I'm thinking is that even though you don't have an engine block heater, you can cycle the glow plug, DEF, Fuel, and associated heaters that will aid in starting your vehicle. If your battery was low to begin with, the temperature sensor calling for all of these other heaters to do their job would exacerbate your voltage issue.

So if the battery needs a charge anyway, there is no harm in cycling the start procedure 2 times. If it doesn't start throw the charger on it. If it still doesn't start, I don't know....
 

DaltonGang

Well-Known Member
Joined
Sep 29, 2018
Messages
1,267
Reaction score
1,472
Location
Houston, Tx
Vehicle(s)
2018 Wrangler JLU Sport S, Rubicon Suspension, Tires, and Rims. Firecracker Red
It’s cold here in TX. -2 with a wind chill of -12 when I got up. He won’t crank. Never owned a diesel vehicle before. Any help? Open carport. Not a garage.
If the temp is -2, then you can pretty much bet it isnt cranking because the fuel is Gelling up. They make fuel additives to prevent this. Also, block heaters are a very good thing for diesels, in cold weather.
 

Advertisement




Freeland Jeep
 



Advertisement
Top