Need some help!

[SVTSnake955]

ok i took the top of my manifold off to clean it up and repaint it and i just put it all back together and now my car is running different and it almost sounds like its camming and then when i shut it off it lets out a pisssssssssst sound like its letting air out of somewhere does anyone have any idea what this could be?????

 

[CC'S95GT]

vacuum leak

 

[SVTSnake955]

thats what i figured too but when i double checked everything its all hookd up and there is no loose vac lines anywhere

 

[MuscleMustang95]

check to see if the line under the upper has a cut in it or something like that

 

[Win]

Take some carb cleaner and spray it around all your lines and if it revs up you have found your leak.

 

[SVTSnake955]

ok guys i looked at all the vac lines again and the only thing i can find is there is two larger vac lines that come from the back of the manifold then it goes into a T and then to a check valve.... that check valve has a strong vacuum and if i cover it with my finger the car runs better so my ? is can i just plug that up or is that supposed to be like that ??? if not why is there a vacuum on it ???

 

[hollywoodstang]

Did you plug the PCV valve back in? may be it's clogged? open the oil cap and see if smoke comes out when you plug that "Strong" vacum line.