Gl550 loud vacuum leak cannot find it! Help!
After getting code p0170 lean bank 1 I checked out my engine and have a loud hissing noise for sure a vacuum leak. I found the pictured hose sitting on top of the transmission near where I suspect the leak is! I thought it was maybe in the injector seats but no! sounds to be directly under injectors possibly bottom of the manifold! It’s driving me insane!