Getting 8.5 mpg need help

[BlueCollarTahoe]

pics above are of the tank dropped and what was seen. the whole thing smelled like gasoline. the metal nut thing on the top was rusted almost shut. they sat it in ********* for 30 min or so. got the old fuel pump out....the float inside had no resistance. just kind of spun around lol all thoe connecting lines that come out the top were rusted almost complete through. the top of the pump had a hole right behind that black connection it was just covered with rust. put your thumb on it went right through. new pump installed running normally. smell is slightly still there i think on the chassis where it was spilling. i filled the tank..204 miles is the est. the miles were going down much slower today though after the replacement. should i still check for a gasket leak graph new info with new pump po455 code is gone btw.

 

[Scottydoggs]

if the code went away on its own, you fixed that issue up.

never seen a pump canister top rot out like that before. most of em are all plastic.

give your trims a few days to learn, check em then. hope you gain some mpg back now.

 

[BlueCollarTahoe]

if the code went away on its own, you fixed that issue up.

never seen a pump canister top rot out like that before. most of em are all plastic.

give your trims a few days to learn, check em then. hope you gain some mpg back now.

one of the mechanics said the same thing. think some salt mightve gone up there over time rot it out? the acdelco one i put in the top of it is metal. like a stainless steel it looked like.

cool hopefully it works out i can get some more spread on a tank full.

 

[HiHoeSilver]

if the code went away on its own, you fixed that issue up.

never seen a pump canister top rot out like that before. most of em are all plastic.

give your trims a few days to learn, check em then. hope you gain some mpg back now.

There is a little "pool" up there where the water sits.

one of the mechanics said the same thing. think some salt mightve gone up there over time rot it out? the acdelco one i put in the top of it is metal. like a stainless steel it looked like.

cool hopefully it works out i can get some more spread on a tank full.

Spayed mine with bedliner when I changed it.

Old.

New.

 

[BlueCollarTahoe]

update:

the gas seems to be lasting alot longer so far. the avg mpg goes up between 9 and 11 depending how long im on the highway. the miles seem to go down alot slower now on the estimation. but...PO455 has returned and i still smell a slight vapor smell from driver side. no where near as bad as before but i noticed it, ugh. may have to go back and see if something from the gas cap area down is loose or something. can i run a smoke test through the gas cap to try and find the leak? like backwards instead of from the front at the engine bay evap hose?

 

[Scottydoggs]

you sure can put the smoke down the gas tank filler neck.

if you smell gas then you'll likely find more smoke coming out of somewhere once more.

 

[BlueCollarTahoe]

hose to tank from the filler neck was loose...replugged cleared code and hasnt returned

 

[swathdiver]

How's the mileage now? Mine's finally doing good, especially on E85.

 

[BlueCollarTahoe]

How's the mileage now? Mine's finally doing good, especially on E85.

its definitely improved but not as much as id like. looking like im gonna get 230-240 out of a full tank after the replacement.

 

[swathdiver]

Let things wear in and adjust and see how it does after another 2-3 tanks of fuel.