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You don't. But you can clean the throttle body with throttle body cleaner. Just follow the directions on the can.
PCV valve
Clean oil
It is part of the throttle body assembly.
It is at the rear driver side of the valve cover. There is a hose leading from it to the Throttle Body.
EGR valve sooted up
It should be underneath the throttle body on the back of the intake manifold
Remove the intake tube and you'll see it under the throttle body. Its a pain to get to the two bolts holding it, you will have to feel your way around to get to the bolts. Unbolt it and remove it, when you remove it clean it with carb cleaner or brake cleaner and let it dry completely.
it could be the stepper motor aka iac (idle air control valve) its located next to the throttle butterfly looks like a motor with two torx 10 screws at either side coloured black take it out and clean it if that doesn't work change the MAP sensor manifold absolute pressure
There is no typical PCV valve in these trucks. There is a ventilation tube that is connected to the bottom of the Resonator box that sits on top of the motor. Says "Vortec 4200" on it. When you take the box off to clean the throttle body - yes clean it if you want to correct idle or stumbling when AC is on - you must ensure that it is reconnected along with the fuel Pressure switch vacuum tube.
How to remove ecu from a renault clio 2003
Buried. It's about two inches below where the throttle body, on the engine side of the throttle body. Good luck.