RB25det problems...idle,acceleration,tranny problems

[tishan]

So like i have an rb25det in a nissan laurel,and it has a transmission hooked up to it.since i bought the car it had an issue whereby when accelerating,the car seemed to be slow and sluggish,like if it was lacking air,and after a while it drived like normal,also it had an idle problem (only when in drive not park)the car would give  a bad idle as if it had bigger cams,(not that it had any).This idle problem wasnt constant though,it happened randomly.But when the accelerator was floored it ran like a beast.however i recently had a problem when i put the car into reverse.immediately it would shut off.no bogging nothing just cuts off as if i turned the key off.i was wondering if yall could shoot some ideas my way.Thanks in advance