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Old 04-28-2011, 09:20 PM   #1
01GTfanatic
 
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Default Loud annoying Hum?

i have a loud annoying hum coming from my engine it sounds like its coming from the cold air intake but im not sure it only does it when its hot out and even if i tap the gas a little it goes away then comes back when the engine comes back to idle. Its definitely not engine noise just annoying and curious of what it could be..Any ideas???

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Old 04-28-2011, 09:46 PM   #2
jayglaze
 
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If you just added the cai it's a typical sucking noise. I can't hear it my car but I can in my wifes truck. When you give it a lip gas the sound of the engine drowns it out. If that's not the case no idea haven't heard if intake making a humming noise. maybe it's vibration of some sort
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Old 04-28-2011, 10:23 PM   #3
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its not quite a sucking noise its just like a loud obnoxious humming and if i really put my ear up to it it sounds it could be from the headers to but i have no idea where or what it could because its so loud..
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Old 04-29-2011, 06:09 AM   #4
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A worn IAC can cause that--read more here...
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Old 02-07-2014, 09:38 PM   #5
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Hey Guys,
I have the same problem. I have the most obnoxious humming coming from the intake region. It started after we cleaned the throttle body and the IAC. I replaced the IAC because it seemed the obvious answer. I tried the regular cheap ones from auto zone and when that didn't work i dished out the money for the OEM Ford one. That didn't fix it either. Still humming away like nobody's business. Ive heard it could be power steering as well. I recently took it in for a regular oil change and they checked all my fluids. They topped off my power steering to the brim which of course is now all over everything. Don't know if overfilling it could cause this issue.

Im at wits ends here. Anyone have any ideas as to what this could be?
Please and thank you.
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Old 02-07-2014, 09:59 PM   #6
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Need to hear it--if you disconnect the IAC feed tube (block the end going to the intake tube) does the noise change/stop? If not it is not the IAC making the noise.

Is the IAC resonator box still in place?


BTW, there is nothing wrong with the "cheap ones from xxxx". They are made by Hitachi, Nippon-Denso or Wells (all Ford OEM suppliers) and therefore are OEM replacements. I ran the AutoZone unit (made by Wells) for over 50k miles with no problems.
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum,
Delta Force tuned, Steeda UDPs, Ralco flywheel,
RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq


Engineering is, at its base, making what you want from what you have.
At its extreme it is making what you want from what you can get.
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Old 02-07-2014, 09:59 PM
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