baezi z06

iTrader: (2)

hi

i'm trying to figure out a problem i have.....

sometimes when in WOT the Wideband shows all sudden lean after 4000 rpm's , i´m seeing all the way up to 15.5 AFR but the strange thing is that the car doesn't loose power or isn't even knocking, but offcourse i slow down right away, but then if i try it again, it's all right just on the spot 12.6 AFR, but sometimes it lean´s out twice in an row....

it never happens in daily driving if i go WOT it's seems to hold hand whith if make tune change's and FLASH (using (HPT) , , could be doing this first after i start the car up maby if i go WOT right away

the inj. readings are ok , the duty cycle is going up to 70% max around 60% often in WOT

Could my fuelpump be the reason, or maby one glogged injector, or maby the MAF is ******* things up or the Wideband sensor/gauge giving fals signals

have anyone heard of this problem

My setup is C5 Vette 2003 402ci NA around 520 RWHP 500 RWTQ
stock fuel pump/rails
and the Bosch GT500 59lbs injectors
c5 z06 ported MAF

thanks

baezi