Tootsie9

Can someone please explain to me why bank 2 is pulling 40% more fuel than bank 1? I swapped O2 sensors ( Denso ) with brand new ones and it still is pulling too much

SAPPER

iTrader: (10)

Leaking Injector

Tootsie9

Ok ill check I appreciate the reply. That sucks becuase they are brand new

Ls7colorado

iTrader: (3)

Brand new? did these come from Ebay, Amazon, or some other Chinese selling source?

Tootsie9

Nope. They were $800 from fuel injector development

LilJayV10

iTrader: (39)

You need to give some background information.

When did this problem start?

Is the car stock?

Why did you replace the injectors?

Are they stock injectors?

If not, has the tune been updated with the correct injector data?

Tootsie9

Installed an LSA SC and have a base tune for it. Problem started after the install when I upgraded the ls1 fuel rail to the ls9 and new 60lb injectors. Tuner says the problem is mechanical. I changed plugs , O2 sensors and still have the issue. Did a smoke test and a leak down and I’ve got no leaks. Motor is far from stock but like I said I didn’t have the issue until I installed the sc. I can’t imagine new injectors and a new rail with 0 miles on it leaking but I haven’t checked that yet

NSFW

Misfires leave raw O2 in the exhaust, which the O2 sensor interprets as running lean, which causes the PCM to reduce fuel.
Is one of the headers primaries less hot than the others? Sometimes you can tell a difference just by licking your finger and tapping the header.
I went through this with my car over the spring/summer, and the root cause was a bad ignition wire harness.

Tootsie9

Could my old MAF be the problem? The throttle body is 102mm and the MAF is only an old 80mm granetelli?