Idle problems I have a 87 iroc 5.7 tpi and i am having idle problems if i let it warm up all the way then it seems to idle ok around 600 rpm but if i try to drive the car before it warms up all the way it idles around 1000 rpm i have done almost everything to this car wires plugs cap rotor computer egr ox sensor hei pick up coil fuel injectors cleaned maf i had a micro tech and it started acting up and then code 33 so i put my old bosch maf in and it seemed like it was working ok the car runs great it is just this idle if not warmed up all the way even if i have driven the car i have to wait for rpms to go down to 600 rpm or it will idle at 1000 rpm could this be another bad maf or a defective computer i have replacecd the iac three times first cleaned and reset then put a new one in and then a better new one not sure what else controls idle when car thanks irockman