V6 less than 5mpg... help.

any ideas why my truck has gotten so bad?
it has a glasspack and ebay injectors, and there is a exhaust leak at the cat flange.
it has a new used genuine maf as all the new ones i could find were counterfeits.
clean air filter and new premium dual electrode plugs recently and a year ago new coils and wires
the throttlebody has no play in it whatsoever so it isnt that.
and it misses at idle

my tps is good, but would it be something with the fact the the fuel pump circuit failed somewhere in the truck and i have it powered by a toggle switch to the battery with a fuse?

I am running out of ideas here and could use some advice.
I am considering parting it out due to bad axles and a extremely rotten frame.
I dont want to because the truck is a v6 5spd 4x4 elocker truck with a lift and a rust free body.
But i am so frustrated that i might just do it.

 

Im thinking it might be something to do with the ebay injectors. You should try to get some OEM ones. The leak at the cat flange wont help things either but wont make that big of a difference. What brand/model plugs did you use? Id only use the manufacturer recommended ones

 

eBay injectors and exhaust leak throwing the truck into a lean condition. Which makes the truck add fuel to correct for the lean condition. That’s my guess.

You have check engine light on for the a/f sensor or a lean code?
What are your fuel trims?

 

my truck only has the bank 1 and 2 knock sensor codes
it was the cheapest injectors on ebay and i regret that
the plugs are genuine toyota and the coils and wires were the best rated ones on ebay i could get- no issues with them so far.
the knock sensors are throwing the codes because the truck shakes pretty bad at idle.

 

i will check fuel trims after school today and post here tomorrow.

 

Gotcha, certainly looks like signs are pointing toward injectors. You might be able to find some low mileage used oem ones on here from someone who swapped them when installing a blower

 

Probably should have a good look at the frame and make a decision based on that before you sink any more money into parts.

On that note, go with good aftermarket or OEM suppliers of parts for stuff like coils, injectors, etc. Ebay and Amazon are not good suppliers.. Plenty of folks on here who can give good recommendations on that front if you decide to keep it

 

the frame is very rough but i am going to cut out the rust until i get to good thick metal and weld in new metal
it was a salt state winter beater that my mom stupidly paid 9,000 dollars for even though i showed her it had bad axles and a bad frame.

also would these injectors be okay?
https://www.ebay.com/itm/4026552110...=2047675&ssuid=&widget_ver=artemis&media=COPY

 

or do i need to get some from one of you?

 

Tires and wheels, how much do they weigh? Are your brakes dragging? Air filter clean?

 

Why did you replace the injectors? I don't trust Ebay or Amazon. With mileage that bad I would check your oil level the sump could be full of gasoline.

 

Stop buying shit from ebay... seriously get things from authorized dealers or known good parts sources. There are several threads on here about where to find good parts.

Do you still have the OEM injectors you pulled out? Send them off to Motorwest or another place to get serviced. Motorwest also sells a "Denso upgrade" set of injectors for a very reasonable price, that most of us run with great success.

 

But it's so cheap. Why pay more?

 

X2 for MotorWest.
I got the Denso upgraded injectors a few years ago and seem to be working great.

 

Just because land locked airports sell sushi rolls, does not mean you should eat them.

 

Maybe u have a fuel leak

 

no fuel leak, new air filter, i am easily able to pick up the 31/1050,15 tires on aluminum wheels, i replaced the injectors as i got ran off the road by a drunk driver and hit a rut in the ditch that cracked one of the old injectors so i replaced them as it was spraying fuel everywhere.
I trashed the old injectors as they came out of the intake in pieces.
do any of you have injectors to give or sell to me?

 

the truck has been burning oil since i drove 10 miles with no coolant in the engine when i redid the timing belt and injectors and forgot to refill the rad. (The headgaskets are fine) so when i change the oil later this week i will check for gas in the oil.

 

also what oil should i put in the trans when i service it?
i have read here about something called redline or something like that.
other than oil changes this truck has never had any maintenance at all since new until i got my hands on it. even the og fuel filter and belts were still on it.

 

Just sold my spares. Hit the BST and see if anyone else has them. The motorwest denso upgrades much more affordable than OEM ones.

Just thinking out loud, as it seems like you may have been in a hurry to replace the broken injectors, did you replace the intake manifold and throttle body gaskets when you had everything apart? How about the crush washers on the fuel rails? If those we're poorly sealed that might be adding to your problem.