First.... you need to give some more information.Raising fuel pressure resulting in leaner AFR!!!
20psi = 14 afr
30psi = 16 afr
40psi = 18 psi.
tried a diffrent AFPR,
changed the Fuel Pump... (from Inline Bosch To walbro)
what could it be....
1jzgteFirst.... you need to give some more information.
What motor? What Mods? Do you have a Standalone or a Piggy back? Standard O2 sensor? Wideband? Hukka?
cant i use, narrow output from a wideband o2 ??
this is a new wideband...try a new wideband. .