I'm looking fo the locayion of the PCV on my 08 Elantra also is there any place I can get a engine diagram for the same car?

i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine fo, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

There's this website I found www.reliable-store.com

they have all details on wiring, servicing, repairing, troubleshooting, fault/error codes, PCV, engine, maintenance info, parts info, instructions on removal, installation, etc. and a lot more.
Just try it out.

You should check out www.reliable-store.com they have info on repair, service, wiring diagram, electrical diagram, fuse diagram, torque specs, troubleshooting, PCV, gear box, owner's/service/repair/parts manual, fault codes, error codes, etc everything on all vehicles. must check it out

Sorry I don't have the diagram, but I do have a diagram of the engine and component locations. Your vacuum system is fairly simple. You have a MAP sensor attached to the air cleaner. I have pasted a picture below. It has one electrical connector and one vacuum hose that goes to the intake manifold or the throttle body.
Behind the right headlight is your evap canister. This will have a hose or line running to the fuel tank. Then it will have another hose going to the purge valve. The purge valve should be close by and it has a connector plus another hose that goes to the intake manifold.
Then you have the PCV hose that goes from the PCV valve in the valve cover to the air cleaner or intake manifold. I think yours just has a hose from the air cleaner and the rest is internal.
There is one more vacuum hose, and that is the bog one that goes from the intake manifold (or throttle body--looks to me like there are a couple of vacuum ports on the back side of the throttle body, and there may be a "T" on one of the hoses) to the brake booster. It this one was off, the engine would not run, as the vacuum draw is large. Please let me know if you cannot figure it out from these instructions and provide a picture, if you can.

MAP sensor:


purge valve:

• As you face the front of the engine look just to the right of the trottle body and down a couple inches. Your PCV valve is is in the back side of the valve cover gasket. Should have a spring clip on it.
• I have uploaded a pictur indicating where the throttle body is located.

• 
  

• Also here is a pic showing the hose that should lead to your PCV valve (moving towards the engine)

• Hope this helps and thank you for using FixYa.

Regards, Tony

You probably should have told me the engine but it's alright. for a 4.3 L v6 go to this sight. http://autorepair.about.com/library/firing_orders/bl-fo-4490.htm for the 2.2 L 4 cylinder go to this sight: http://autorepair.about.com/library/firing_orders/bl-fo-4488.htm
It was hard to find those sights so i hope i helped. If you got a different engine tell me and i'l find the correct diagram.

SPI Vacuum Diagram


Zetec Vacuum Diagram

SPI Vacuum Diagram


Zetec Vacuum Diagram



Zetec Vacuum Diagram

If it's equipped with the 2.0L SPI engine (eighth digit of the VIN is 'P'), the most common place for a vacuum leak on these engines, is from the PCV hose that runs from the valve cover to the back of the throttle body. Where it usually rots through is the elbow at the back where it connects to the throttle body. Hope this helps. The only place i could find any views is here. vacuum hose diagram - Focus Fanatics

 rough-idling engine can signal a number of positive crankcase ventilation (PCV) valve problems, such as a clogged valve or a plugged hose. But before beginning the functional checks, double check the PCV valve part number to make certain the correct valve is installed. If the correct valve is being used, continue by disconnecting the PCV valve from the valve cover, intake manifold, or hose. Start the engine and let it run at idle. If the PCV valve is not clogged, a hissing is heard as air passes through the valve. Place a finger over the end of the valve to check for vacuum.



With the engine at idle, vacuum should be felt at the PCV valve.