87 4.6

Ok so ive done a 4.6 swap in my fox foxbody came woth kennybell supercharger 9psi eec came from a 2001 as well as the motor and trans. The eec has a Diablo chip the prob i have is the o2 are not getting power with the key on in the non run pos. So does it have to be running to get voltage? It starts up and runs but the wideband is all pissed off at idel fist start its around 10.8 then goes to 11.5 and just normal drivnig 11.2 10.8 then 12.5 under boost . I have 255 in the tank fuel pressure set at 40 tr6 plugs thanks for any support ppl can offer.

88 orangepeel notch

Welcome to the forum.

I'm no expert in this, or the 4.6, but are you sure the wideband is reading correctly ? Are the plugs black ?

And my wideband gets power in the " key on" position, so maybe yours isn't getting power from the correct "key on" power source.

Let us know what you find.

87 4.6

Yeah we use the fox Dash and just spend everything out but I don't think we couldn't complete connection to everything because we didn't use engine wiring harness so the O2 sensors have no power going to them I'm thinking because we're not getting a complete circuit in the engine bay weird because I have the right voltage going to my throttle position sensor and my mass air flow meter but no power to the O2 sensors

87 4.6

I didn't read your entire post we are using the key ignition key off the 2001 setup so that we didn't have to flash the ECU and also serves as a security device so I think you may be right is not getting power on maybe I'll try turning that key instead of just having the key stuck in it