Hissing by the firewall?? AIR?

[Gary 420A RS]

behind the the engine by the firewall. i hear a hissing sound like constand air leaking somewhere. i have no idea where it is i checked all the lines i could find then nothing. its sounding as its coming from under the fuel rail.. if anyone would have any idea what it is let me know.. ill post up a video of it later.

 

[andymoraitis]

Check for a torn lower injector seal. These often make whistling or hissing sounds when they don't seal properly anymore. Running a boost leak test would be a great idea in addition to checking all of your vacuum lines (just to be safe).

Let us know what you find,

Andy

 

[Gary 420A RS]

and yesur! it was an injector seal. second one from the left was not seated so i loosened the fuel rail and made sure all of them were in while i tightened it down. i used a flat head to push the seal in place.

NO MORE HISSING!!