What's new
By:
Ram Heavy Duty Forum

Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

Gas gauge 5 gallons off

QuattroCS said:
the system needs about 1 to 1.5 gal to maintain fuel pressure. that amount will never be used.

knowing the limit is helpful when it is really needed.

some vehicles are ok with topping off all the way up the neck, other dont like it (i have typically found it takes 2-3 gal more in the neck, my outback and allroad do this, and on long road trips its helpful. on a 2020 outback i rented by topping off the neck i was able to get 600 miles per tank.

not sure how these trucks do, or if there are diff between the gas and diesel cousins
Click to expand...
Topping up a gasser is a good way to ruin the charcoal canister. Wouldn't recommend it.
 
64Gasser said:
I’ve never heard of this before. Can you explain?
Click to expand...
Basically, and depending on the fuel tank/evap system design, topping up or overfilling the fuel system can result in liquid fuel entering the charcoal canister. The canister was only meant to deal with fuel vapors - not liquid fuel. It can plug up the different orifices and ports in the canister, plug up/ruin vent valves, etc. I've pulled out defective charcoal canisters from vehicles that weigh 4x the amount of the new replacement and usually when turned upside down liquid fuel mixed with charcoal flows out.
 
jetrinka said:
Basically, and depending on the fuel tank/evap system design, topping up or overfilling the fuel system can result in liquid fuel entering the charcoal canister. The canister was only meant to deal with fuel vapors - not liquid fuel. It can plug up the different orifices and ports in the canister, plug up/ruin vent valves, etc. I've pulled out defective charcoal canisters from vehicles that weigh 4x the amount of the new replacement and usually when turned upside down liquid fuel mixed with charcoal flows out.
Click to expand...
Good thing to know. Thanks for the explanation.
 
You must log in or register to reply here.
Back
Top