My car is throwing a check engine code of 45, which means it is either running to lean or too rich. My car has RC 320 Injectors and a greddy piggy back ecu on it. What should I do to stop my car from either running lean or rich? What are my steps?

 

you've got to find out if it's runinning lean or rich .Are your plugs black or do you smell fuel at idle?If your using the box check the map senor in/out wires.The map signal is interrupted and diverted to the box then it's modified and then sent to the ecu. So if that wire was not wired correctly nothing is controlling those injectors at idle and they will run rich at idle and lean it boost.

 

Thanks, I forgot that you can check your plugs in order to find out between rich/lean. I'll see what I can figure out then post back.

Thanks