Hey Frank, it sounds like to me that your having the same problem that alot of ur are having and so far we havent been able to come up with a fix. I've replaced: TPS, MAP, IAT, ECT (engine coolant temp. ) and none of these seem to do the trick. I'm gonna replace my Camshaft Position Sensor when I get home from Florida and see if that will help any. Hope this helps, take care!