3.0L fuel issue

[splat_master86]

i just finished my 543 swap and i am running into a problem with keeping a good a/f. the a/f will stay between 14.8-15.2 at idle. when i give it gas it goes to 10.8-12.6 for like 2 seconds, then to 16.1-16.5 and once i let off the gas it goes to 18-??? and stays. wtf is happening. i have tried a million adjustments. i have a 255lph inline holley pump, 32lb injectors, vortech sfmu. i have tried fuel pressure settings from 27-50psi. all i want is the a/f to stay around 12.6-13. i run 3 or 8psi. What can i do? is there any ECU cal out there for 3.0L? Do i need to get a aftermarket piggyback or standalone?

[turbovanman²]

Are you talking under load or just revving it up?

Have you had your oxygen sensor checked that its working properly?
Is your af guage hooked up properly?

If running a wideband, is is calibrated correctly? where have you put the bungs?

[splat_master86]

just revving it.
i didnt want to drive it till everything was ok.
brand new AEM UEGO wideband right after the bend in my down pipe.
it also almost dies when i disconnect the neutral/park wire

[turbovanman²]

I would drive it carefully first, revving it up can give false numbers.

Did you calibrate the wideband?

[splat_master86]

the AEM wideband said not to calibrate becuase it comes calibrated. it said to only calibrate if the signal wire length is changed.