MPG Question (point me in the right direction)

[Blue95]

Yeah something is wrong to only be able to get 200 per tank, this is also where people that have deleted their EGR valve start to suffer, I have seen multiple people get rid of their EGR valve on these TBI motor's and loose about 2 mpg out on the highway.

When I bought my truck all it had was LT's and some stupid exhaust setup and I could get 17 all interstate avg. 70 MPH with 3.73's and 265/75/16 with a passenger. I wish I could still run EGR now though.

 

[TylerZ281500]

just roughly measured and the tank is about 44x13 i didnt take ionto account the divets in the tank or anything like that. is that close to what you guys have?

 

[Tempted]

Engine RPM does not have as much to do with fuel economy as many people think. It is engine load. The power range of our motors are where max economy is at. Too low of an RPM means the motor is lugging and you have to press the throttle harder. Think of putting 38s on a stock geared truck. In OD the engine doesn't make enough power to cruise at 55mph. The RPMs are too low and you have to lean on the throttle. In D the engine pulls the load at a higher RPM but a lower throttle input, using less fuel.

 

[TylerZ281500]

When I bought my truck all it had was LT's and some stupid exhaust setup and I could get 17 all interstate avg. 70 MPH with 3.73's and 265/75/16 with a passenger. I wish I could still run EGR now though.

why cant you

 

[ChrisAU]

just roughly measured and the tank is about 44x13 i didnt take ionto account the divets in the tank or anything like that. is that close to what you guys have?

Check this out:

http://www.lmctruck.com/icatalog/cd/full.aspx?Page=107

Look on the right side below the pics for dimensions. Looks like you have the 25 (26) gallon tank to me!

 

[TylerZ281500]

so the sending unit is off? or the fuel guage is off?

 

[ChrisAU]

so the sending unit is off? or the fuel guage is off?

Either or both.

 

[TylerZ281500]

anyway to check the guage?

 

[ChrisAU]

anyway to check the guage?

When you fill it up, does the needle go past the full mark?

 

[TylerZ281500]

a little bit. it hides for awhile then it drops. 100 miles is a half tank so 8 gallons based off the 16 gallons i filled up.