Join Date: Feb 2005
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I'm awaiting an answer to your question, also. I've googled "TBI whistle" ten ways from Sunday and not come up with much. My Howell was howling not too long ago. I read somewhere that the Idle Air Controller can sometimes get a piece of something stuck in it so that it doesn't seat all the way . . .
The squeal would change pitch with throttle position, disappearing at highway
pedal, returning when I let off. And then it would just go away by itself.
Mine wouldn't start singing until it got warm, and then it got as loud as you say yours is. People turning their heads in adjacent vehicles at the signal stops, on the sidewalks . . . I removed the IAC and cleaned it with WD40 and blew out its mounting hole with compressed air - the squeal changed pitch but was still there - for a couple days, while I googled my arse off looking for anything on the subject - and then it stopped doing it entirely. Hate that. I want to know whats happening! Its squealed at me as I stood there with the hood popped, air cleaner off, looking directly at it, and I couldn't even triangulate the position of the source of the squeal - I moved my hand around, wiggled hoses, covered apertures, nothing changed the sound -
and then it would stop. Frustrating.