so ive been hearing a hich pitched whistle during accelerations at low rpms coming from the engine and i cant figure it out. its been doing it since january and its starting to get annoying. its not my intake, that make a different sound. thanks.

 

You have an aftermarket intake right? Mike does it at certain throttle angle, Evans does it. Beards does it as well when he had it. If you are that worried about it then put stock airbox on and drive it.

 

yea its the intake probably, mine does the same thing, ive gotten used to it now...

 

It whistles at accel? If it does it at idle I would say it's the IAC. Whistling on acceleration would be IAC tho...

 

mine did it when i had an intake

 

no the intake makes a different sound. this started happening way before i got my intake.

 

bingo! There's your answer... does it sorta sound like a supercharger humming? if so, thats it... theres a way you can take it off and clean out the carbon deposits, but I just bought a new one...

 

thats exactly what it sounds like. what is the IAC and where is it found, how much for a new one, and what does it do?

 

when my iac went.. it sounded almost like an electrical hum

 

You have a SOHC and I have a OHV, so I'm not sure... my guess would be about the same place mine is... attached to the throttle body...

 

what does it stand for and what does it do, look like? sorry for all the questions i just am not that familier with my engine yet.

 

man I need a new IAC too :(

 

Idle Air Control

its a valve the controls the amout of allowed to enter for idle speed


You can try to clean it and relube it. The problem may go away.

New parts cost varies 50ish to 100, depending on vendor.
any parts house should have it or be able to get it

 

thanks.

 

if you take off the SOHC cover you will see it. Its the grey thing on the intake just after the t-body.

i cleaned mine and it went away for a few weeks, but it came back.

may just wanna buy a new one

 

sorry to jack this thread but, are intakes really worth it? i want to buy one soon and was wondering if you can tell the differance in HP?

 

i got a better throttle response and maybe 2 or 3 more mpg if i kept the pedal off the floor.

 

does that mean it was worth it?

 

mine whistles too. it never did it until I put in the MAC intake. I think it sounds pretty neat lol

 

Whistling under accel (unless its very light) isnt the IAC
If its doing it at idle too It might be the IAC.

When Mine went on my thunderbird it was extremely loud and sounded like a cross
between a cow and a whale.

 

mine does it around 60ish and I can tell its in tube :)

 

mine whistles also, I just think of it as my turbo. It doesn't bother me, but I do know it's there.

 

Mine's done it since I removed my air silencer. but it's really not that loud at all.

 

the iac sorta looks like this one, its on the right side of the throttle body (black cap off) when standing infront of the truck.

http://www.explorerforum.com/data/50..._black_cap.jpg