i am having the same problem with a 97 altima GXE. i think i've tried everything i kno. the only thing left i can think of is to reset the injector timing by disconnecting the negative terminal for a good 24 hrs from what i've researched. ny other suggestions please let me kno. i think its the injectors because when i take off the fuel pump relay the car tries to crank over fine. but when i put the relay back on the car keeps jerkin on me and still wont turn over