1993 Plymouth Acclaim How to raise the idle and tighten the

I have a 1993 plymouth acclaim 4cyl the idle is kind of low I dont know where to raise it and I noticed the throttle cable is very loose im afraid its gonna come off the guider on the throttle body is there a way to tighten this and could that be why the idle is low I have performed all scheduled maintanence for this car timing, fuel filter, cap, roter, wires, plugs, all belts, water pump, thermostat, trans service etc