Whistling sound

Asked by Rhemar Dec 19, 2016 at 02:14 PM about the 2002 Ford Explorer Eddie Bauer 4WD

Question type: Maintenance & Repair

When I start my car it is making this loud whistling
sound. I have a 02 Ford Explorer V8 Eddie Baurer
edition.
I was told it could be the Eavc system, vacuum
needs to be cleaned and now they are saying it
could be a bad alternator. The only thing is my
lights nor radio are dimming and my battery is just
under a year old.
We've used the throttle body and air intake spray
and we don't here it anymore but I need better
answers to the possible problem.

1 Answer
104,165

KenF answered 8 years ago

Pop the hood, if the noise is coming from the alternator, you should be able to tell pretty easily. You can also have any auto parts store do a free check on the charging system (battery and alternator) so if it's bad you'll have your second opinion. To me, a whistling sound is associated with a vacuum leak. Try to pinpoint the source of the sound, sometimes a can of starting fluid lightly sprayed near the leak will cause the engine to rev, indicating you found the leak.

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