whistle at idle??

charliebucket · April 12th, 2009, 12:09 PM

hey gents, i have a high pitched whistle at anywhere from 800-1000 rpm. seems to be coming from throttle body or upper intake area. motor info in my garage. very annoying and loud. has anyone else delt with this??

J0rn3z · April 12th, 2009, 12:28 PM

Originally Posted by charliebucket

hey gents, i have a high pitched whistle at anywhere from 800-1000 rpm. seems to be coming from throttle body or upper intake area. motor info in my garage. very annoying and loud. has anyone else delt with this??

Did the same on mine, and it was a a gasket, Mines also carbed though, Check the gaskets up under your TB.

JBIGBOOTSY · April 12th, 2009, 01:11 PM

Originally Posted by charliebucket

hey gents, i have a high pitched whistle at anywhere from 800-1000 rpm. seems to be coming from throttle body or upper intake area. motor info in my garage. very annoying and loud. has anyone else delt with this??

Cheer up Charlie, dont be blue.... Its prolly a vaccum leak. For the "Golden ticket", spray carb cleaner around untill the idle picks up.

charliebucket · April 12th, 2009, 01:27 PM

thanks for the replies, i have sprayed around everything in the area. i read in another post about there being a possible problem between having a larger throttle body than the opening for the intake. i'm not sure what the standard opening for the gt40 tubular intake is. does that sound possible?

93mustank · April 12th, 2009, 05:09 PM

BBK throttle body?

89LX347 · April 12th, 2009, 05:24 PM

Originally Posted by 93mustank

BBK throttle body?

thats what i was gonna say.....get used to it

1slo5.0 · April 12th, 2009, 05:49 PM

Bigger throttle bodies whistle.

charliebucket · April 13th, 2009, 06:14 PM

holley 70 mm. same size as intake opening. i do have the iac restrictor gasket in, to help return to idle from rev, without "hanging up"

1slo5.0 · April 13th, 2009, 06:44 PM

Originally Posted by charliebucket

holley 70 mm. same size as intake opening. i do have the iac restrictor gasket in, to help return to idle from rev, without "hanging up"

Larger throttle bodies whistle. What is the "IAC restrictor gasket"? Hanging idle is caused by alot of things. Putting a band aid on the problem isn't going to fix it.

JBIGBOOTSY · April 13th, 2009, 08:10 PM

Originally Posted by charliebucket

holley 70 mm. same size as intake opening. i do have the iac restrictor gasket in, to help return to idle from rev, without "hanging up"

Restricting the iac is just gonna make it take longer to make adjustments.

Stangzilla · April 13th, 2009, 11:08 PM

Originally Posted by Darrell

Bigger throttle bodies whistle.

+1 on that. I run a 80mm tb and it whistles. No biggie.. I pretend i have a turbo!! lol..

cburns · April 14th, 2009, 02:52 AM

I am having same issue. I have taken it apart the whole lower upper intake twice. Never changed the whistle. I have a trickflow intake and summit 70mm throttle body and egr spacer. It is very annoying hope someone post a way to fix this. Just FYI for anyone with trickflow intake dont spray carb cleaner on it takes the paint off.

86_Notch · April 14th, 2009, 09:15 AM

Maybe you've got one of these

YouTube - Bubb Rubb and Lil Sis

JBIGBOOTSY · April 14th, 2009, 09:44 AM

whooo, whooooooooooooop!

1slo5.0 · April 14th, 2009, 10:11 AM

Originally Posted by cburns

I am having same issue. I have taken it apart the whole lower upper intake twice. Never changed the whistle. I have a trickflow intake and summit 70mm throttle body and egr spacer. It is very annoying hope someone post a way to fix this. Just FYI for anyone with trickflow intake dont spray carb cleaner on it takes the paint off.

There is no way to fix it. Bigger throttle bodies whistle, just like we've been saying.

AJHXXXIII · April 15th, 2009, 10:06 AM

Does this help at all?

BBK Throttle body whine/ high pitched noise fix - Ford Mustang Forums

cburns · April 15th, 2009, 11:47 AM

That sounds like a good start to getting this fixed. I will be do this probally tomarrow and post results Thanks

charliebucket · April 20th, 2009, 05:49 PM

the iac restrictor allows motor to return to idle faster from rev up, without hanging. i have ground all burrs i could find, as posted by ajhxxxiii, (thanks for the info by the way) but, still, same whistle. cburns, do you have an intake spacer on yours? maybe thats it, i dont know.

1slo5.0 · April 20th, 2009, 07:02 PM

Originally Posted by charliebucket

the iac restrictor allows motor to return to idle faster from rev up, without hanging. i have ground all burrs i could find, as posted by ajhxxxiii, (thanks for the info by the way) but, still, same whistle. cburns, do you have an intake spacer on yours? maybe thats it, i dont know.

That IAC restrictor sounds like a band aid for a problem. That isn't that piece from Ford that goes between the IAC and the throttle body with two air bleed screws in it, is it? As far as returning to idle quickly, as long as everything is functioning properly and is tuned right there will be no issues with the engine returning to idle without hanging. All of my EFI cars have reved like carbureted cars (acutally much better) unless there was a problem. No special restrictors or anything of the sort under my hoods.

April 12th, 2009, 12:09 PM	#1
charliebucket Newbie 1989 gt 347 Join Date: Apr 2009 Location: central new york Posts: 8 Blog Entries: 1 iTrader: 0 reviews	whistle at idle?? hey gents, i have a high pitched whistle at anywhere from 800-1000 rpm. seems to be coming from throttle body or upper intake area. motor info in my garage. very annoying and loud. has anyone else delt with this??

April 12th, 2009, 05:09 PM	#5
93mustank Banned Join Date: Aug 2008 Location: Phoenix,AZ Posts: 3,014 iTrader: 1 reviews	BBK throttle body? __________________ PeteAndersonRacing.com

April 12th, 2009, 05:49 PM	#7
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Bigger throttle bodies whistle. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

April 14th, 2009, 02:52 AM	#12
cburns Newbie 1989 mustang gt vert Join Date: Oct 2008 Location: henrietta texas Posts: 21 iTrader: 0 reviews	I am having same issue. I have taken it apart the whole lower upper intake twice. Never changed the whistle. I have a trickflow intake and summit 70mm throttle body and egr spacer. It is very annoying hope someone post a way to fix this. Just FYI for anyone with trickflow intake dont spray carb cleaner on it takes the paint off. __________________ If you aint first ur last!

April 14th, 2009, 09:44 AM	#14
JBIGBOOTSY MM Fanatic 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 4,392 iTrader: 0 reviews	whooo, whooooooooooooop! __________________ Bolt-on Abraham Lincoln Log motor. With extra wiring.

April 12th, 2009, 01:27 PM	#4
charliebucket Newbie 1989 gt 347 Join Date: Apr 2009 Location: central new york Posts: 8 Blog Entries: 1 iTrader: 0 reviews	thanks for the replies, i have sprayed around everything in the area. i read in another post about there being a possible problem between having a larger throttle body than the opening for the intake. i'm not sure what the standard opening for the gt40 tubular intake is. does that sound possible?

April 13th, 2009, 06:14 PM	#8
charliebucket Newbie 1989 gt 347 Join Date: Apr 2009 Location: central new york Posts: 8 Blog Entries: 1 iTrader: 0 reviews	holley 70 mm. same size as intake opening. i do have the iac restrictor gasket in, to help return to idle from rev, without "hanging up"

April 15th, 2009, 10:06 AM	#16
AJHXXXIII Regular 1991 5.0 LX Join Date: Jun 2008 Location: Findlay, Ohio Posts: 132 iTrader: 0 reviews	Does this help at all? BBK Throttle body whine/ high pitched noise fix - Ford Mustang Forums

April 15th, 2009, 11:47 AM	#17
cburns Newbie 1989 mustang gt vert Join Date: Oct 2008 Location: henrietta texas Posts: 21 iTrader: 0 reviews	That sounds like a good start to getting this fixed. I will be do this probally tomarrow and post results Thanks __________________ If you aint first ur last!

April 20th, 2009, 05:49 PM	#18
charliebucket Newbie 1989 gt 347 Join Date: Apr 2009 Location: central new york Posts: 8 Blog Entries: 1 iTrader: 0 reviews	the iac restrictor allows motor to return to idle faster from rev up, without hanging. i have ground all burrs i could find, as posted by ajhxxxiii, (thanks for the info by the way) but, still, same whistle. cburns, do you have an intake spacer on yours? maybe thats it, i dont know.

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