5.7 hemi will not start in extreme cold

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Bohio

Junior Member
Joined
Apr 27, 2022
Posts
1
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Location
ohio
Ram Year
2020
Engine
5.7
New to forum. My truck will not start in 0 degree cold. Engine will crank but will not fire.
The brake pedal goes goes stiff and doesnt go down when hitting start button. It feels like it goes into a safe mode and cranks for about 5 seconds. The truck had a full tank of gas and I even had fuel treatment added to the tank.
The first time it happened I thought the injectors were frozen so i put a hair dryer on the engine, after about 20 minutes the truck would start and run fine. (no engine code) This happened 4 times this past winter.
I took it to the dealer and explained exactly what happened and of course they couldn't find anything wrong.
Now I only have about 2,000 left on warranty.
 

PoMansRam

Senior Member
Joined
Apr 30, 2018
Posts
2,089
Reaction score
2,549
Location
East Aurora NY
Ram Year
2019
Engine
Hemi
An odd one for sure and is going to be about impossible to troubleshoot if it only happens at 0degF and under.

l don't get the only crank for 5sec thing, then stop, unless this is some feature on 5th gen Rams.
 
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