Look! A flying orangutan!
Join Date: Mar 2003
Re: buzzing sound from motor at idle
Get a can of cheap degreaser.
While the engine's idling, spray it over the whole intake system, one part at a time, and listen for the idle speed to change.
Don't be afraid to use plenty of it, it sounds like only a small leak so you'll have trouble finding it I imagine....
Oh BTW don't forget the vacuum supply lines for the dash and brake booster.
Proud TQE Operator and President of SEFAG - the Society for the Elimination of Ford Automatic Gearboxes
Pacemaker headers + 2.5" exhaust
EF Fairmont interior
Lowered King springs
5 speed manual
Newest mod: EF Ghia wiring loom and dash