Vacuum leak frustration

[jesse53]

so i just finished up fixing my leaky intake manifold gasket, got it back started and i hear a hissing towards the back of the motor just like i did before the change, spray some carb cleaner and the engine sputters and stalls so i guess i didnt fix my leak problem anyone have any suggestions what could be leaking towards the back of the intake manifold near the head maybe egr or something?

[-RJ-]

did you make sure to get rid of all the old gasket when you removed it the first time?

[MooMoos14]

Does it sound like a screaming bird when you let off the throttle after reving it? If so, Check your #4 injector seal. Mine is installed backwards, i heard the hissing sound, sprayed some wd40 on the seal(Soaked it) and the hissing is permanently gone now!

[jesse53]

yea of course, i cleaned the entire side of the head with brake cleaner and scrapped off all the old gasket with a razor and i changed all the injector o rings and seals its just a faint hissing in the back of the engine bay.

[MooMoos14]

Pull the #4 injector o ring out, and flip it around. and try that.