Rb20 Motor Running Rich

[joeg]

looking for help I have a 1986 GTS coupe Rb20 motor It started with the motor back firing since then i have not been able to get it to run proply I have changed the air flow meter ,igniter ,air oxygen senor I have had the computer checked its supposed to be fine so at the moment when it starts its running rich so any help would be great thanks.

[blind_elk]

How old is the battery? (Nissans are renowned for being extremely voltage sensitive).

Have you had the injectors cleaned? (Maybe 1 or more injectors stuck slightly open by gunk).

Replace the spark plugs (after you solve the current problem).

[joeg]

new battery new plugs injectors have been checked and ok at the moment cant find ecu for it to try.