When I rev my car through the RPM range the car feels like it revs very slow. It just doesnt feel as though it is running right. Would a rich condition cause this, or is there something else I should check? Opti, plugs, wires are brand new. The car just feels sluggish is there anything to check out that could make it rev smoother. I have also checked the TPS and it is well within spec.

 

when my fuel pump was starting to go out i noticed my car would sometimes rev very slowly and cause a power loss. that was only when i was driving it, I think it reved ok when it was in neutral.

 

you could check the cats if they get cloged it will rev slow.

 

Ditto!!!! Check this before anything! I had the same symptoms, removed the cats and replaced them with an off-road y pipe, problem salved!

 

your sig says you have exhaust mods, did you get a LT4 KM? maybe you are getting alot of false knock with your exhaust causing the pcm to retard timing.

 

cats are a good one to check, those will really slow you down if they're clogged. I had the same problem as you, my car reved real slow and it seemed like it just wan't fast anymore, although everyone told me it felt quick. well I started checking everything, and it turned out to be my throttle cable, the plastic piece in the front broke allowing the cable to slide forward and as a result the butterflies were only opening about 40%, after I fixed it, it was like I added 100 horses. So have someone push the throttle down all the way and check if they're opening up all the way

 

the sig says its a 93 motor, could you get a lt4 KM for the 93 lt1??

 

cant use lt4 knock module on the 93's

 

Well here is a little update, I have no cats, and no I have not desensitized my knock sensor. I will do that next. Also like said above I cant use the LT4 KM on the 93.