i cleaned both ports in the intake, changed fuel filter,checked comp on all cylinders about 100 pounds each,did ohm test on knock sensor resistance 530 ohm's,if i beat the car it runs well but normal driving low aceleration poor gas milage the car shutters what do i do next? PLEASE HELP

 

Ummmm..... And what car are we talking about?

 

And what error code is tripped causing the CEL?

 

Oh Scott, you"re right on it, Man!! Good job!!
Good question that I should have thought to ask, but I have no code book so it wouldn"t mean too much to me anyway.