Throttle Body Noise

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May 28, 2013 | 08:47 PM

Aftrmidnite

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Fleet Mechanic

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Throttle Body Noise

The Throttle Body on my 2001, 4.6 L is making a strange whiring noise, when you puy your hand on the intake pipe, you can feel a slight vibration. The Truck idles and runs okay, with no codes. Giving it a little gas and the noise goes away. The last thing I did was clean the IAC with Gum Out Carb cleaner, the second or third time I've done this over many years, with no problems. I'm a little perplexed at the cause.

May 29, 2013 | 08:18 PM

LxMan1

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From: Louisville,Ky.

It is the IAC vibrating. About time for a replacement.

May 29, 2013 | 10:14 PM

Aftrmidnite

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The IAC isn't vibrating, and the noise isn't coming from there. The Truck was having some rough idle, almost stalling issues before I cleaned the IAC. Now it is smooth idling. It sounds like when a heater motor has bad bearings. If you pull the air cleaner it is especially loud.

May 29, 2013 | 10:24 PM

JWC 3

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From: Tennessee

The IAC will make this noise . The sound will resonate throughout the air tube to the filter housing .

May 31, 2013 | 09:45 PM

Aftrmidnite

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Thanks JWC 3, that's exactly what was causing the noise. I replaced the IAC this afternoon, and all is quiet. Also thanks to LxMan1.

May 31, 2013 | 10:29 PM

JWC 3

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From: Tennessee

Quote:

Originally Posted by Aftrmidnite

Thanks JWC 3, that's exactly what was causing the noise. I replaced the IAC this afternoon, and all is quiet. Also thanks to LxMan1.

Happy I could help . Thanks for posting your fix !

Jun 2, 2013 | 01:08 PM

fordcrzymike

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Joined: Apr 2012

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From: Tamaroa, IL

Just did the same thing on my 97, took a while for me to pin point the problem. I thought cleaning it would fix it, but it turned out that it just needed to be replaced entirely.