Engine runs great in open loop. pulls like a train. all senors are new and look good on the scanner. when it switches to closed loop after the o2 get hot, it runs like crap and misfires randomly on wide open throttle and and at part throttle does not pull good. I have talked to market place tuners and they say because you cannot record the data stream on 96 to 98 they could only guess what might work. Is there a way to figure out what open loop is and then convert that to closed loop or just make it stay in open loop? I have been chasing this for months.It has been to a number of shops with zero result. Yes the fuel pressure is correct under load and idle Everything looks great till you get it off open loop and put it under load. new bosch injectors new PCM with stock tune. all sensors are reading correct and the PCM throws no codes. It thinks all is good. Help?