Does the 04 maxima contain wideband 02 sensors or regular ones? The reason that I ask is because my research has led me to believe that you need to have wideband 02's in order to tune with a safc. I currently have hollowed cats, ypipe on the way, custom exhaust from resonator back, grounding kit, jet maf, and k&n drop in filter. I plan on getting phenolic spacers and iridium plugs soon and just want to be able to get the most out of my mods. Maybe an safc isnt the way to go im not sure? I just dont want to lose any low-end torque after my exhaust work. I thought maybe the safc would help some way. Any info. welcome and thanks guys.
Jay

 

Are you still pulling up codes with the holed out cats?

 

no not yet

 

I believe a five wire wideband....I may be wrong.
The A/F sensor is a planar dual-cell limit current sensor. The sensor
element of the A/F sensor is the combination of a Nernst concentration
cell (sensor cell) with an oxygen-pump cell, which transports
ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 <
< air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygenpump
cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the A/F sensor is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required

This is the bosch oe replacement for the 04 upstream sensors:Wideband A/F Sensor - OE Type - Exact Fit - Upstream Sensor Two required; 5 Wire; Wideband A/F; Check / Replace Interval: 100,000 Miles