There is a hole on the back of the upper intake manifold, just below the back of the throttle body, is a vacuum hose supposed to be attached here? Have a serious vacuum leak, no coolant loss, no overheating, just had cop's and spark plugs done, now she backfires, stalls and will not stay running, mech. says its an intake gasket but the gasket and lower intake manifold look new.
Any ideas?
Thanks , Pete, I am nowhere need mechanically inclined but willing to learn

 

Heard a pop, then stalling and misfiring and loud vacuum leak.
Hope to learn how to post in the appropriate forums in the next little bit, just joined so sorry if I am aggravating anyone with posts in the wrong forum.

 

That I believe is where the hose for the pvc valve goes.

 

Thanks you Colonel, the protruding piece is about .5 inch diam and 1 inch long, no hose attached just now so i am assuming it maybe popped off, where would the other end of f the hose be located?
Thanks for your help.

 

Start at your pcv valve in the right valve cover and just trace it around to the back. It could just have popped off and be somewhere on the backside of the engine or it just might have completely blown off.

 

Hey Colonel, looks like the hose from the pcv is about 10 inches long and runs into a 3 way junction just above the right valve cover, does not go all the way round back! Don't know if the port on the back of upper intake manifold was maybe blocked off and the plug came out? Does not look like a normal set up, I did read someone else had a similar experience and blocked off the rear port completely. I only bought the truck a month or so ago and have not used it much.
I will snap a pick in the morning.
Thank you sir.

 

Won't let me post attachments, guess I have to upgrade the membership.

 

Blocked off the port with some heater hose and a plug, truck runs sweet.