Engine humm when air temp. is worm or hot - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 04-16-05, 01:01 PM
Jarred Jewett via CarKB.com
Guest
 
Posts: n/a
Engine humm when air temp. is worm or hot

I have a 98 ford explorer sport. When the temp. is warm outside the engine
starts to make a humm. It sounds like it is comming from the intake. I
was wondering what other people think it might be. I think it might be the
intake air flow sensor. No codes and no lights.


 
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 04-16-05, 03:01 PM
Jim Warman
Guest
 
Posts: n/a
Re: Engine humm when air temp. is worm or hot

The hum (sometimes described as a moan) is *usually* due to the IAC
resonating. Replacing the IAC has cured these.


"Jarred Jewett via CarKB.com" <forum@nospam.CarKB.com> wrote in message
news:25482e180c014c0695eaa46217d70a59@CarKB.com...
> I have a 98 ford explorer sport. When the temp. is warm outside the

engine
> starts to make a humm. It sounds like it is comming from the intake. I
> was wondering what other people think it might be. I think it might be

the
> intake air flow sensor. No codes and no lights.



 
post #3 of 4 (permalink) Old 04-16-05, 08:01 PM
Jarred Jewett via CarKB.com
Guest
 
Posts: n/a
Re: Engine humm when air temp. is worm or hot

What is the IAC? What does that stand for?
 
post #4 of 4 (permalink) Old 04-16-05, 10:02 PM
Just_Steve
Guest
 
Posts: n/a
Re: Engine humm when air temp. is worm or hot

Idle Air Control (valve). Computer controlled valve, allows air to bypass
the throttle plate (thus controlling engine idle speed). Takes the place of
the screw that used to hold the throttle plate slightly open on the
carburetor. If I remember, mine looked something like this
http://www.partsamerica.com/product_...A0-AC/AC56.jpg Depending
on your engine, yours might look something like this
http://www.partsamerica.com/product_.../NIE/22972.jpg

When mine went bad (actually, when I ruined it by trying to clean it) it
caused my '96 4.0 OHV to sound like a toy horn at idle, sound would go away
when throttle was opened. Real simple to replace, bought mine for about $45
at O'Reilly.

"Jarred Jewett via CarKB.com" <forum@CarKB.com> wrote in message
news:be9b8e107aff49a29d90b6075a0c5b20@CarKB.com...
> What is the IAC? What does that stand for?



 
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Fordforums Community > USENET NewsGroups > rec.autos.makers.ford.explorer


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are Off
[IMG] code is Off
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome