Running lean

[dropem]

Ok so my truck has started acting real weird at first start up my truck runs real rich like 10-11 on the wide band at idle but when it gets into boost it pops mainly out the wastegate and it doesnt get any leaner. but once it warms up while its around 14.6 or so at idle and crusing but once it give it gas the wide band it only goes to like 11.5-12.4 and once it gets into boost it has gotten all the way up to 15 and i let off of it immeaditly but i am clueless on what could be going on

things i have though
fuel pump not enough, i have a walbro 255
fuel filter stoped up
maf going out
tune not right, but it only just started doing it
Oxygen sensors are bad
Wideband not correct?

P.S what should the voltages be on the oxygen sensors while in boost to be in a safe limit

[mean05]

How much boost are you running...mine was running out of fuel around 9psi with the 255lph and we are around the same setup....

the part that doesnt make sense is why all the sudden is it messing up, if it was fine before then you have a sensor gone bad some where

[dropem]

well i adjusted my controller so its around 9 now so what did u do for a pump
i was thinking about either doing 2 walbro 255's and a msd boost a pump or a aeromoive 1000 but im not sure if i can run factory lines still but with adapters for them and if i need a pressure regulator

[mean05]

i did a complete fuel system....255 feeds into a bosch 044 pump that runs into -8 feedline to a Y then into each rail and then through the rails into a aeromotive FPR and returns back into the tank

[RedHeartbeat]

Nice. Where's the pics?

[mean05]

[nonecktribe]

wow your setup looks really nice i gotta see that in person...

[RedHeartbeat]

Wow, its getting pretty busy under that hood.

[GasGuzzler]

Yes it is and it's sweeeet.

Seems to me on a non-SD tune you should see mid 800's mV on the O2 WOT if everything is A-OK.

[mean05]

Yes it is and it's sweeeet.

Seems to me on a non-SD tune you should see mid 800's mV on the O2 WOT if everything is A-OK.

my 02's read round 890's when the AFR is in the high 10's