Thread: jdm sr20de running rich..?

i believe i got a stock se-r ecu, and last owner said motor has 370cc injectors, thing is i dont want motor to be running rich, what should i do...?

why would you suspect the engine is going to run rich becuase of the larger injecotrs? are there any other supporting mods for those injuectors, ie: fuel press reg,fuel pump ect, what other mods are on the car? have you comfirmed the injecotrs are indeed 370s

get the stock 259 injectors(red) and put those on.

last owner said motors got bc stage 2 cams, jwt ecu, walbo 250 fuel pump...fuel & air ratio gauge its showing rich (GREEN LIGHT)

The first thing that you have to do is figure out whether the JWT ECU is set up for 370s or 259s. If you know how to do it you can pull the bin code (I can help you read it), find a label on the ECU, or call JWT with the name of the person who bought the ECU and check JWT's records.

What kind of AFR gauge do you have -- is it a wide band or just an indicator light that says lean/rich? If the latter, you will eventually need a wide band to sort this out. At light throttle, say 40MPH in 4th gear, on a level road, does your indicator light toggle back and forth (lean to rich)?