Whistle

lvmustanggt · Feb 10, 2008

As most of you know I have been having this whistling problem for over year now. I have change alternator, IAC, EGR, Idler , belt and tensionner and no luck.

Today I spray carb cleaner to ever vacuum hose there is and upper and lower intake
no idle change so I know there is no vacuum leak. As I listen I feel like it's comming from back of the engine and I am thinking now it maby my starter motor might be making that whistle?

Does starter whistle when it's going bad ? Where else should I look guys ? I am getting annoyed and frustrated that I am thinkning about selling my car .

Please help

fobra559 · Feb 10, 2008

Could it be your C&L Plenum? I have the same plenum and it whistles under slight throttle but goes away after I give it a little more gas.

lvmustanggt · Feb 10, 2008

fobra559 said:
Could it be your C&L Plenum? I have the same plenum and it whistles under slight throttle but goes away after I give it a little more gas.

I even put stock plenum and tb but still there's whistle. It's all started after my cams went in last year.

fobra559 · Feb 10, 2008

I don't think it would be the cams, did you check if your intake manifold is cracked?

lvmustanggt · Feb 10, 2008

fobra559 said:
I don't think it would be the cams, did you check if your intake manifold is cracked?

I checked it but don't see any crack, I sprayed carb cleaner to see if idle change but noting. My car does have idle problem as it goes up and down a little. I am thinking starter went bad or I just have to take the hole upper and lower intake out to see if it's cracked somewhere I cannot see.

fobra559 · Feb 10, 2008

lvmustanggt said:
I checked it but don't see any crack, I sprayed carb cleaner to see if idle change but noting. My car does have idle problem as it goes up and down a little. I am thinking starter went bad or I just have to take the hole upper and lower intake out to see if it's cracked somewhere I cannot see.

Do you have your cams tuned properly? That could cause the idle problem if it's not tuned correctly. As for the whistle problem, does it only occur when driving or at idle?

lvmustanggt · Feb 11, 2008

My car is dyno tuned, as for the whistle is starts after 1500rpm and up . At idle no whistle at all but as soon as my rpm 1500-2000 then I can hear the whistle. Every time I shift I hear like siss like BOV letting air out. When I am driving at 2000 rpm it's constant whistle. If my rpm falls down below 1500 I don't hear a thing even I am driving or idle. What can It be ?

Thank in adavance to help me out

Jacob_Royer · Feb 11, 2008

my car does it too... hopefuly my new intake makes it go away

GettinThere · Feb 11, 2008

If you truly don't have an air / vacuum leak, then I think it's the design of the plenum that causes the whistle. My TFS plenum whistles, and I'm 99% sure there is no leak. It only seems to whistle slightly, and only within the lower rpm range. Sounds kinda like blowing across the top of a coke bottle.

98COBRA281 · Feb 11, 2008

I had a vacume leak once I sprayed carb clean all over the motor with no luck then I found out that that type of carb clean wasent flammable, got some flammable sturf and found it

lvmustanggt · Feb 11, 2008

I use autozone carb cleaner and it's says flammable. I will have to take things apart and look

Where was your leak ?

98COBRA281 · Feb 11, 2008

pcv hose that connects to the plenium had some small cracks in it

fobra559 · Feb 11, 2008

lvmustanggt said:
My car is dyno tuned, as for the whistle is starts after 1500rpm and up . At idle no whistle at all but as soon as my rpm 1500-2000 then I can hear the whistle. Every time I shift I hear like siss like BOV letting air out. When I am driving at 2000 rpm it's constant whistle. If my rpm falls down below 1500 I don't hear a thing even I am driving or idle. What can It be ?

Thank in adavance to help me out

If it whistles in the upper rpms, then it's most likely you have a crack somewhere around your intake manifold or upper plenum. Also a leaked vaccum hose can cause idle issues.

lvmustanggt · Feb 15, 2008

It's all started after my cams install so I called the shop today and told him about the problem. Going to drop it off on thursday. Hope he finds the problem.

fobra559 · Feb 16, 2008

I hope they get it figured out and all goes well. Keep us posted.

lvmustanggt · Feb 16, 2008

fobra559 said:
I hope they get it figured out and all goes well. Keep us posted.

I will and thank you for your help

lvmustanggt · Feb 29, 2008

I picked up my car today but still there's whistle. I told them to look for leak and they end up changing the lower intake gasket . I told them , I haven't change lower intake gasket so they though it might help.

They are saying they don't know what causing the whistle and it might be just air turbulence. I had to pay 298.00 for it so I am not happy at all cause I told them to do leak test before changing any thing. My wife is so mad with me for spending money on my car cause we just had a baby girl ( she is 2 months old ) so my wife is not working and I am not making money to support both of us.

Other then that my car runs fine just this ****ing whistle

Thanks

CobraRed_96_GT · Feb 29, 2008

I found people have the same symptoms in Oakland: http://youtube.com/watch?v=ccgXjA2BLEY

RandyStinchcomb · Feb 29, 2008

some of that noise could either be the IAC or the hose going from the air inlet tube to the IAC...there is a black box inline on that hose that acts as a muffler, make sure that there are no cracks in that "muffler" or the hoses

mustang gt 2003 · Feb 29, 2008

I have the same problem with the wistle....its honestly driving me crazy and i am also considering selling my car. I believe it all started after i installed the new TB and plenum. At first i thought it was my clutch and TOB so i had everything replaced...and that didnt solve the problem. Soon enough im going to put the stock intake tube back, stock TB, and plenum to see if that helps. Hope you find your problem...so i can fix mine too!!!

Whistle

lvmustanggt

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fobra559

At least it's more erect and not floppy anymore.

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At least it's more erect and not floppy anymore.

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At least it's more erect and not floppy anymore.

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