anymore idea's on why my 240 is running rich?

stats:

my parts have been swapped out for these known working parts and made no difference:

mafs
02 sensor
ecu
fuel rail and fpr

stuff thats different from stock:

z32 fuel filter
walboro fuel pump
no intake air control valve (idle regulated by throttle body cable)
no secondary 02 sensor

things i think may be the problem:

water temp sensor going to the ecu (idk how to check and see if its getting a signal though)
gas is pretty old.