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post #1 of 14 Old 04-16-2010, 05:41 PM Thread Starter
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Please help diagnose

Some days this happens some times it doesn't. After getting her warmed up on freeway usually (doesn't seem to do it cold). I'll let off the gas and chirp chirp chirp as I am idling down and coasting. Then sometimes if I get on it hard and let of there is a loud chirp chirp and then as I am coasting down chirp chirp chirp chirp. Sometimes I think I can hear it very quiet at idle but I think that is just my head. Any Ideas?

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post #2 of 14 Old 04-16-2010, 05:53 PM
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Where is the sound coming from?

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
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post #3 of 14 Old 04-16-2010, 05:56 PM
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I agree with dave, more info please

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post #4 of 14 Old 04-16-2010, 06:12 PM Thread Starter
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That might help, it's coming from the engine compartment, sounds like it could be closer to the passenger side. Also, it seems like it might be related to when the boost builds up. It happens a lot when I am throttling up a hill.

The chirp almost sounds similar to a belt or pulley but you really can't hear it when it is idling and it doesn't do it when the truck is cold.

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post #5 of 14 Old 04-16-2010, 06:29 PM
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do you here the chirping at all when you turn off the truck and the turbo is winding down?

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post #6 of 14 Old 04-16-2010, 06:44 PM Thread Starter
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Not that I have noticed. I'll listen more closely next time, but I am pretty sure that it doesn't.

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post #7 of 14 Old 04-16-2010, 06:50 PM
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my money is on the driveline support bearing mine sounded like a police siren when it went out

Now this was a superior machine. Ten grand worth of gimmicks and high-priced special effects. The rear windows lit up with a touch like frogs in a dynamite pond. The dashboard was full of esoteric lights and dials and meters that I would never understand.
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post #8 of 14 Old 04-17-2010, 01:57 PM Thread Starter
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Listened today, and I couldn't hear any chirping as I shut off the truck.

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post #9 of 14 Old 04-19-2010, 09:47 AM Thread Starter
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Bump for any other input...

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post #10 of 14 Old 04-19-2010, 10:24 AM
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Quote:
Originally Posted by Lucy06 View Post
Listened today, and I couldn't hear any chirping as I shut off the truck.
Ok is it as you shut the truck off or driving the truck?

if you cherp while the truck is shuting down most likely its the rotationals of the motor fighting the serp belt...crank turns a bit while everything else sits still...or while running money is still on that bearing

Now this was a superior machine. Ten grand worth of gimmicks and high-priced special effects. The rear windows lit up with a touch like frogs in a dynamite pond. The dashboard was full of esoteric lights and dials and meters that I would never understand.
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