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Buzz from left fuel rail of V12 (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Mike on May 26, 2001 at 20:52:51:

I'm having a loud buzz from the left fuel rail only at idle. It feels like the fuel pressure regulator is vibrating strongly if you touch it(the right one doesn't). It can be heard loudly from the inside of the car. Both fuel pressure regulators are new and made no difference. new fuel pumps and filters made no difference either. If you remove the bolts to the rail and move it around it can go away. The engine runs well in every way except for that loud noise. If you remove the vacuum hoses from the fuel pressure regulators it can cause it to start the noise (if it's not happening right then. Any ideas? thanks.

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