You might want to check if the injectors are firing at all. Seems like you got a fuel delivery problem since compression are spark are supposedly good. You probably have a bad ECU. make sure your getting 12 volts to all the injectors and that the ecu is triggering them. if all that shows to be good. swap out with the SAME injectors. i dont know 240sx but i know nissans uses the same resistance injectors. useing injectors from different models are probably not helping you due to the fact they might have different resistances.



oh and the reason that you have fuel coming out the tailpipe... you have a misfire. which means you arent buring fuel... which then gets pumped out the tailpipe