I have a 97 Mustang GT with the 4.6L engine that produces a sound at about 1800 RPM that should not be there. It is a resonance...a humm, buzz, vibration, or such...that can be heard well, as if it is emanating from the plastic intake manifold. At idle, if I get under the hood and rev the engine, this resonance is pronounced as the engine goes up and down through the 1800 RPM range. I know I need to take it into the shop...any ideas on what I am hearing and how bad it is? -- SailorDan --
- posted
20 years ago