96 nissan 240sx notice 2.4L. DOHC Inline 4-cyl. noticed a few weeks back issue with rough starts would start for a second then die out. would have to press on the accelerator to keep it going then it ran fine . problem persisted and worsened now it wont even start. has ignition but doesnt sound like its getting fuel sometimes it will almost start yet roughly and only for a second . was thinking fuel pump or fuses checked fuse and all are ok .. where can i trouble shoot and how?