bit more detail. its under the intake to plenum along the fuel rail, that's the thottle sensor to the right. its on a 3.5 efi flapper (4CU ecu) but i think it could some form of air solenoid valve or something from the hotwire (14CU/X ecu), hence not plugged in.
OK next question, if this is a solenoid operated air valve for air con and its in a 90 with no air-con and not connected does that have any effect? should it be removed and bypassed or blanked off?