car idles for 10-15 sec dies, dies when givin throttle

[heggytime]

93 240sx, it has a s14 drivetrainthough(has 2 bolt on valve cover) car was running well with only 3 problems. injector leak and exaust leak and a hard start (usualy,sometimes ok). today it ran like normal but when i was leaving the car wash i gave it gas and it died. i started it again and it orked like normal. i got to my house and changed the o ring on injector and started the car and the problem is here for good. hard start as usual then idles then dies after 15 or so sec, when i give gas it dies as soon as i do that. my ecu is throwing a code 55 and iv crunk it and tried getting the ecu to catch the problem but it wont. im assuming its a fuel issue but idk, i searched and found 1 other peson with same problem but thread nver finished or gave much hint as to the problem besides a vacuum leak or something.

[ShouldaHadaV8]

Look in the troubleshooting section of the FSM ( factory service manual ) its labled EF and EC at the botom of the page. it will go over any problem your having.