Truck Repair: Vacumn Leak, intake manifold gasket, pcv valve

Question
I have a dodge pickup 1500 with a 5.2. Heres the problem I have an idle problem with the truck Check engine and all. Taking a look into it and noticed a huge sucking noise coming from the breather tube in the air cleaner. Now if I remove the PCV and plug the hole I still get the Sucking. I beleive this is probably a intake manifold Gasket leak, what do you think?

Answer
Hi Steve,
Take a can of Carburetor/PCV valve cleaner, and with the truck running, spray it around the gasket area where you think it might be leaking.
It should have absolutely no effect, but if it causes a difference in the way the engine is running, you can be pretty sure there is a leak.

Van