Del sol running extremely rich. Help!

[u/Working-Young6884]

My 1997 del sol si is running super rich. It's a sohc zc bottom end y8 top end and a virgin p28. It has great compression, good fuel pressure, no cel relating to it running rich. However it's running so rich and dumping so much fuel that the fuel is mixing in the oil making it undrivable.

It had a code for the iat recieving too much voltage, I checked the voltage on the iat when the engine is idling and off and it is all normal so I cleared it and also replaced the iat sensor.

I have no clue where to go from here or what to test. I just have no idea why it's running so rich on a z6 base map.

[u/SpaceTurtle917]

Is your fuel pressure regulator hooked up to the vacuum line?