I've got a 98 Taurus with the 3.0L Vulcan and about 64K miles on it.
It's recently developed a chirping noise coming from the engine compartment. The noise sounds just like a moderately loose belt; not the screech of a really loose belt. Figuring a loose belt, I popped the hood and tried to locate the source of the noise.
Much to my surprise, the noise was NOT coming from a belt. Instead, it seemed to be coming from the top to the back of the engine itself, maybe anywhere from the intake to between the engine and the firewall.
Other notes: The noise occurs regardless of what gear the transmission is in. It seems to go away almost completely as the engine warms. The frequency of the noise occurring increases as the RPM increases. The air conditioning settings make no difference (thought it might have been the blower motor at first).
I'm no car expert here, but I can't really think of any moving bolt-on engine parts in this area of the engine that would cause the noise. I know the EGR valve is in that area, but would it cause a noise that varies with the engine's RPM?
Any ideas? I'm starting to get really worried here since it's my daily driver, I'm broke, and a noisy car usually doesn't fix itself, only worse.
Thanks!
Pete