Well i have had this problem for a while now(with old fuel set up and with the new). When under boost during a hard pull my afr will be in the 14-13 but when i ease into boost(usually a pull on the highway) i will see 11-12. But whether it is a hard pull of not when i let off of the gas after the pull my afr goes to a rich 10 every time. This is making me think that the stock injectors are not working right.


a rundown of my current set up on my atx 420a
-portfueler system with 30lb injects
-stock injectors for primaries (only this and the stock o2 sensor is what i haven't replaced)
-areomotive 1:1
-walbro 255 high flow intake pump
-new fuel filter (replaced about 4-5months ago)
-fcd from eclipse982nrRST set to 4.6v

my old set up was just basic setup..
-stock injectors and a 12:1 fmu and a high flow 255 walbro and fcd(only did that for like 4 months though cause it sucked)


Now originally i thought this was a problem with my wideband(zeitronics) cause i have the wideband o2 sensor located next to the stock o2 sensor on the dp(that is how i got my dp so i just reused that spot). But i pulled the plugs today and they were white just like i thought so it is running lean under boost.

I also just got my software for the portfueler and i am going to pick up the cable today so i can see what the map is tuned to.

thank you,
kevin

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13psi on a built bottom end with a stock now mtx, check mate.

also i forgot to add my fuel pressure at idel is 58-60 and when under boost 66-69

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13psi on a built bottom end with a stock now mtx, check mate.