5.4 fuel range
06-18-2015, 07:14 PM
#1
Member
Thread Starter
5.4 fuel range
got a weird question, today i was driving and new i had a low tank and the fuel range was around 50km to e, and the meter was showing just a tad above e, then the range said 0 km to e and the meter went to 1/4 tank, is there a reserve area on the tank that stores some fuel for extra km to make it to a gas station 
06-19-2015, 06:04 AM
#2
Moderator (Ret.)
Many folks here complain that the "miles to empty" is vague, meaning it appears to read differently between several trucks. Gas sloshing around in the gas tank when you get that low is going to be a large factor in the PCM/ECU attempting to determine how much fuel is left, and how many gallons to empty range you have.
Best to just not run the truck below 1/4 tank.
Best to just not run the truck below 1/4 tank.
06-19-2015, 07:19 AM
#3
Senior Member
Occasionally, mine gets funky once it gets around 1/4 tank. I'll look down and it reads something like '102 miles to E', then a few miles down the road later, it reads '139 miles to E'. No change in mpg reading. Once, I filled it up, but the gauge read 1/4 tank. Over the next 3 days, the gauge slowly crept up to an accurate reading (at that point, about 3/4 tank). Weird.
06-19-2015, 11:32 AM
#4
Member
Thread Starter
Many folks here complain that the "miles to empty" is vague, meaning it appears to read differently between several trucks. Gas sloshing around in the gas tank when you get that low is going to be a large factor in the PCM/ECU attempting to determine how much fuel is left, and how many gallons to empty range you have. Best to just not run the truck below 1/4 tank.
06-19-2015, 11:34 AM
#5
Member
Thread Starter
Occasionally, mine gets funky once it gets around 1/4 tank. I'll look down and it reads something like '102 miles to E', then a few miles down the road later, it reads '139 miles to E'. No change in mpg reading. Once, I filled it up, but the gauge read 1/4 tank. Over the next 3 days, the gauge slowly crept up to an accurate reading (at that point, about 3/4 tank). Weird.
06-19-2015, 02:16 PM
#6
Moderator (Ret.)
How warm during the day, and cool at night does it get in your area? Warm days/cool nights create condensation in the tank, and this will ruin your gas quicker than "old fuel"!
Last edited by Mod (Ret.); 06-19-2015 at 02:24 PM.
06-19-2015, 10:15 PM
#7
Member
Thread Starter
Around 20-27 celceus during the day and 10-15 at night lol very abnormal temps in Alberta right now
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06-22-2015, 10:48 PM
#8
Senior Member
If you have the XLT or higher cluster that compute the MPG the low fuel light always comes on at 50 miles to empty.
The 50 miles is from the average MPG and how much gas it thinks it has in the tank
The 50 miles is from the average MPG and how much gas it thinks it has in the tank