I just rebuilt my engine and put a 306 cam in it which was tuned by pcmforless. It is set to idle at 1000 rpm's, would it hurt if I get it set at 800rpm's? Could this low of rpm's cause the engine to be more shakey and in return cause me to not have much engine life? Also I guess I can't use the idle screw to do this, right? Thanks for any help.

 

If ya are using the factory tach to say what it is idling at,it is probably wrong. If ya got no drive ability problems I would leave it alone.