Turbo swappers, Help!

[280Zone]

I am looking for some more ideas… I have installed a rebuilt 81 turbo engine into my 1975 280Z. I also used the 81 turbo wiring harness. I seem to have everything hooked up but it appears something is still wrong. The car starts and runs and sounds good. The problem is that as the engine gets to operating temperature it starts running too rich. The things I have tried are;

Jumping head temperature sensor contacts (bypassing sensor)

Tested head temp sensor, tested fine.

Replaced head temperature sensor with a brand new one.

Bypassed water temp sensor

Tested water temp sensor, tested fine

Replaced water temp sensor

Tested sensor continuity back to ECU, all tested fine

Tried a different ECU, problem still there

Tried a different AFM (could not test per service manual since terminal numbers did not match book)

Replaced injector electrical plugs along with head temp sensor and air regulator electrical plugs.

Grounded AFM

Grounded ECU

Grounded engine block

Set timing to 20 degrees

 

I have a inline fuel pressure gauge and an adjustable fuel pressure regulator. Fuel pressure seems to be constant and rising when engine is revved.

 

Any ideas on anything else I should check would be appreciated.

[BayAreaZT]

Try a new O2 sensor.

[280Zone]

Can you elaborate? I have an air fuel meter hooked to it to read my very rich condition so wouldn't it be sending that same signal to the ECU?

[340ZXTTAZ]

Correct me if I'm wrong but the O2 sensor only aids in fine tuning the fuel curb on a stock EFI system working in conjuction with the AFM. If the map is way off or the injectors too big the ECU will not compensate for that big diffrence.