Can anyone tell me the location of the oxygen sensors (supposedly 2 ?) on a 1995 B1500 Ramwagon with a 318 V8. I have located one of them, after Y shaped exhaust pipe in front of the catalytic converter, and replaced it. Online auto parts guides indicate there are two sensors and also the auto parts store guide indicates two required. It's not after the catalytic convertor or on either exhaust manifold that I can find. I'm beginning to think that maybe there was a change midway through the model year or something? Maybe switching this/these out will solve my loss of power problem. The vans got 132K miles and should of had the new sensor/s at 100K I guess. Thanks