Around 3,600 or 3,800 I have a stumble and my car feels slow as hell. If I am half throttle in any gear and floor it there is no difference. If I am flooring it and put it in 5 and it starts to slow down and lose speed. Sometimes at idle it jumps from 1,400 to 1,800 over and over again, normally idles at 1,400. One of my secondaries is not working. I just had the injectors cleaned and flow tested, new plugs and a recent oil change. Car has no cats and a brand new exhaust from exhaust manifold back to after market muffler, and a cone filter. Gutted and no polution pump or ac or power steering and there is no wire for my o2 sensor. Thanks for any help.

 

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