i have a 91 sl withan intake and high flow cat the prob. is that i threw in a rebuilt engine and now it doesnt seem to have as much power in the low end as it did doesnt really have any type of pull till like 3000 rpm any one know what i could check i already did the computer, injectors , cat , plugs , o2 , and wires. also there is a sensor on the driver sideof the intake manifold that has 2 plugs going into it and turns well i took it off and dont remember how it went so i just put it back on.so is the sprocket inside supposed to be turned all the way to the right (rear of car) or to the left (front of car).

 

any help!!!!!!!!!!!!!!!!!!!!!1