Getting 8.5 mpg need help

[Scottydoggs]

no need to spray that for a test, we know its leaking bad.

o ring is bad, or a line is snapped / cracked at the pump.

hit the strap bolts with some pb blaster for a day or two before you tackle the job, lowers the odds of that stripped bolt action.

 

[BlueCollarTahoe]

shop is doing this one. my boss caught me doing the tranny fluid change and chewed me out dont need him getting riffed over the gasoline smells lol i will prepare it for them tho lol now lets talk parts ill be ordering from rock auto most likely but need to know the part numbers for the proper fuel pump assembly, the gasket and that metal ring. also the straps. i read somewhere its good to replace those for future maintanence. 2004 chevy tahoe 5.3 V8 T VIN.

 

[BlueCollarTahoe]

No research. AC Delco. Rock auto. 5% discount code.

which one breh? i seen a couple ac delco that seems would fit mine...T vin. is there an RPO code for what i already have in therE?

 

[Scottydoggs]

id grab a new pump and canister, this way you get a new sending unit as well. re use everything else, shop likely wont have any issues. id not even lube the bolts for em. let them earn that money lol

 

[Scottydoggs]

i find often i can get things cheaper at advanced auto on line with a discount code and have it in hand 30 minutes later. and have a nice local warranty too.

 

[BlueCollarTahoe]

id grab a new pump and canister, this way you get a new sending unit as well. re use everything else, shop likely wont have any issues. id not even lube the bolts for em. let them earn that money lol

send me some lanks bro of what you talking about exactly. i changed all the other parts of the evap system if thats the canister you talking about. lol i hear yah.

i find often i can get things cheaper at advanced auto on line with a discount code and have it in hand 30 minutes later. and have a nice local warranty too.

you got a point there!! i need some product numbers to make it happen though

 

[Scottydoggs]

you just need to enter your year make and model and parts that fit will show up in the search. if they show a vin# letter or number make sure yours is a match. the flex fuel pump might be different.

random search for a 04 tahoe, thats pretty much what the whole canister and pump looks like. you can buy just a new pump for like 40 bucks and replace it, but im not sure you can buy a new seal for the top of it.

https://shop.advanceautoparts.com/p...Lz_tq3UHPokCAvePepRoCdhkQAvD_BwE&gclsrc=aw.ds

 

[Scottydoggs]

well look at that, they do sell just the seal. that pumps not cheap, and yours seems to work still. 13 dollar seal might be worth it.

https://shop.advanceautoparts.com/p...9666acd/10809256-P?searchTerm=fuel+pumps+seal

 

[BlueCollarTahoe]

you just need to enter your year make and model and parts that fit will show up in the search. if they show a vin# letter or number make sure yours is a match. the flex fuel pump might be different.

random search for a 04 tahoe, thats pretty much what the whole canister and pump looks like. you can buy just a new pump for like 40 bucks and replace it, but im not sure you can buy a new seal for the top of it.

https://shop.advanceautoparts.com/p...Lz_tq3UHPokCAvePepRoCdhkQAvD_BwE&gclsrc=aw.ds

thanks i got the t v getting parts together at the cheapest i can find from different sites. wish me luck guys will update when i get the stuff done and hopefully it helps.

 

[HiHoeSilver]

which one breh? i seen a couple ac delco that seems would fit mine...T vin. is there an RPO code for what i already have in therE?

Rock shows MU1639

well look at that, they do sell just the seal. that pumps not cheap, and yours seems to work still. 13 dollar seal might be worth it.

https://shop.advanceautoparts.com/p...9666acd/10809256-P?searchTerm=fuel+pumps+seal

I dunno, the top of that pump looks petty rusty, those lines are probably about to break off, too. I would also buy the lock ring. You gotta beat that thing pretty good to get it off.

 

[BlueCollarTahoe]

okay so acdeelco fuel pump module with sender, float, strainer and pump, lock ring, gasket seal, and new tank ties. anything else?

 

[HiHoeSilver]

okay so acdeelco fuel pump module with sender, float, strainer and pump, lock ring, gasket seal, and new tank ties. anything else?

I broke one of these taking it off

Also used new ones for these.

 

[swathdiver]

My own preference is for GM/AC Delco OE or Original Equipment parts whenever possible. Then down to the Professional Line.

Looking up an '04 Tahoe with the LM7, MU1639 is the OE pump and sender and under the Professional line it is MU2294. This was from AC Delco website.

 

[BlueCollarTahoe]

My own preference is for GM/AC Delco OE or Original Equipment parts whenever possible. Then down to the Professional Line.

Looking up an '04 Tahoe with the LM7, MU1639 is the OE pump and sender and under the Professional line it is MU2294. This was from AC Delco website.

okay i ordered the MU1639 they didnt have that pro level one listed but after looking at it i shouldve check for that. didnt know u could look up on ac delco. thanks for that. next big item i change i will look for the pro version. gonna get that hardware you posted too. looking to get this done by the end of the week. parts should be here wednesday

 

[HiHoeSilver]

okay i ordered the MU1639 they didnt have that pro level one listed but after looking at it i shouldve check for that. didnt know u could look up on ac delco. thanks for that. next big item i change i will look for the pro version. gonna get that hardware you posted too. looking to get this done by the end of the week. parts should be here wednesday

The Pro is just good replacement for OE. It doesn't really make a difference almost ever in my book. Just be sure you're not buying the Advantage parts when they come up.

 

[BlueCollarTahoe]

do yall think this is gonna help my MPG issue?

 

[Scottydoggs]

it might help, but that all local thing is the main factor killing your mph.

i just hit a solid 10.0 light footing it local. i hardly drive it due to this, weekends only for the last month or so. my race toy gets better mpg on the local trips to and from work, a tank of gas will last me a month in that thing.

 

[swathdiver]

do yall think this is gonna help my MPG issue?

It might if it was leaking fuel. With my first car, I was tracking my mileage with a steno pad. Each tank of gas got worse and worse mileage. At 6 mpg I popped the hood and fixed a leaky hose. Went back up and then I wasn't driving the car much with school but as I completed my calculations from the last tank, my mileage was 1.1 mpg! Popped the hood and got a woof of gas and another very leaky fuel line replaced! LOL Those were the days!

Here's one for ya. Since October, the truck has taken on 460.7 gallons. It has burned 436.6 gallons. The current fuel is not part of this equation. So what happened to 24 gallons? I'm thinking the computer did not account for it during the remote starts. What do y'all think? With the way our DIC computer options are set up, we can keep track of actual fuel used and not just how much we pumped in. Often we pump in one amount and burn another. It's not much different but long term it does affect the accuracy of calculations.

 

[BlueCollarTahoe]

getting done tomrrow. ever since we ran smoke in the truck and took those pics the mpg got exponentially worse and i can smell gasoline inside the truck with the windows up. ill update with whats found tomorrow.

 

[BlueCollarTahoe]