Cai problem? - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 10-09-2013, 04:07 PM   #1
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Cai problem?

Ok not sure what's going on...my 02 GT has a weird noise coming from the area of the cold air intake. It does it mostly when it's idling and when you rev the engine it tends to stop after a second. If it stays at idle while making the noise after about 10 seconds the engine will almost always die. I took the while thing apart, replaced the air filter and nothing has helped. Not sure what to do next. Anybody have any thoughts?
Attached Thumbnails
Click image for larger version

Name:	image-1706177226.jpg
Views:	101
Size:	403.2 KB
ID:	131986  
Kuhn77 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-09-2013, 04:08 PM   #2
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Quote:
Originally Posted by Kuhn77 View Post
Ok not sure what's going on...my 02 GT has a weird noise coming from the area of the cold air intake. It does it mostly when it's idling and when you rev the engine it tends to stop after a second. If it stays at idle while making the noise after about 10 seconds the engine will almost always die. I took the while thing apart, replaced the air filter and nothing has helped. Not sure what to do next. Anybody have any thoughts?
I made a video of the noise but not sure how to post it
Kuhn77 is offline   Reply With Quote
Old 10-09-2013, 04:24 PM   #3
Road Trip!
 
Join Date: Sep 2013
Location: grande prairie
Region: Canada
Posts: 495
clean your maf
Mustangman705 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-09-2013, 04:27 PM   #4
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Quote:
Originally Posted by Mustangman705 View Post
clean your maf
The sensor?
Kuhn77 is offline   Reply With Quote
Old 10-09-2013, 04:40 PM   #5
Registered Member
Regular
 
Rm360's Avatar
 
Join Date: Feb 2012
Region: Illinois
Posts: 1,140
Quote:
Originally Posted by Kuhn77 View Post
The sensor?
Yes you can try cleaning the sensor and the inside of the housing , also check the screen inside to make sure there is no blockage, be sure to go to the auto parts store and get a can of MAF cleaner
Rm360 is offline   Reply With Quote
Old 10-09-2013, 04:44 PM   #6
Road Trip!
 
Join Date: Sep 2013
Location: grande prairie
Region: Canada
Posts: 495
yah take it off. you will need to get a special screwdriver bit tho... its a torqs or whatever with a hole in the middle.. auto parts store sells them.. take it off spray it really good with maf cleaner and do not touch the wires .. let it dry completely... and even if its not the issue its good to clean it anyways
Mustangman705 is offline   Reply With Quote
Old 10-09-2013, 04:54 PM   #7
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
I'll give it a shot...thanks a lot for the help guys.
Kuhn77 is offline   Reply With Quote
Old 10-09-2013, 05:08 PM   #8
Registered Member
Regular
 
v8pony's Avatar
 
Join Date: Aug 2012
Location: Monmouth County, New Jersey
Region: New Jersey
Posts: 2,201
Is it like a weird bloooop bloooop type of noise? If so I had the same problem, could not for the life of me figure it out...noise stopped when I went AM cai lol, sucks cuz our stocker does a pretty damn good job so I essentially spent 100$ for the noise to go away lol
__________________
2002 5spd GT
Feb 2013 Mustang of the Month
v8pony is offline   Reply With Quote
Old 10-09-2013, 06:04 PM   #9
Registered Member
Regular
 
Mfore33's Avatar
 
Join Date: Feb 2012
Location: Murfreesboro
Region: Tennessee
Posts: 540
That bloop bloop could be a backfire thru the intake. Mine would do that sometimes. I thought I had. Timing issue but a friend told me to check my exhaust for leaks. Turns out I had a few holds in the pipe. This lets air in and it would sometimes ignite the unburnt fuel causing the sound to travel and I could hear it at the intake.
Mfore33 is offline   Reply With Quote
Old 10-09-2013, 06:14 PM   #10
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,415
Is this noise sort of a (I'll use Cliffyk's description) French horn sound? Or a very deep hum?
If so it could be the Idle air control valve is worn out and vibrating.
straybullitt is offline   Reply With Quote
Old 10-09-2013, 06:20 PM   #11
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
It's a deeper sound...Kind of like a deep rumble. Would any if these cause it to idle down and the car die after a few seconds. It doesn't always die..sometimes the idle will get super low like it's about to die and then the noise stops and the idle goes back to normal.
Kuhn77 is offline   Reply With Quote
Old 10-09-2013, 06:24 PM   #12
Registered Member
Regular
 
Mfore33's Avatar
 
Join Date: Feb 2012
Location: Murfreesboro
Region: Tennessee
Posts: 540
Well with that information I would suspect the aic to be faulty. The faulty aic will not keep the engine running at idle. When mine went out I would need to apply brakes and a little gas to keep running at stop lights. If you have a buddy with a mustang ask to swap the aic from his and see if the problem goes away.
Mfore33 is offline   Reply With Quote
Old 10-09-2013, 06:40 PM   #13
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,415
My car was making a French horn sound. It would go away after revving the engine a bit. It was very intermittent. And the engine never died. I was never able to see, or hear where the noise was coming from. I couldn't get out and get the hood opened before it would stop.
Another person had the same issue in a recent thread and one of the forum members linked a write up about the IAC being a probable cause.
I changed my IAC about a week ago and I haven't heard the noise since.
The idle is also much better now. It holds RPMs better when letting out the clutch from a stop and the RPMs don't "hang" like they used to.
straybullitt is offline   Reply With Quote
Old 10-09-2013, 09:20 PM   #14
Registered Member
Regular
 
cliffyk's Avatar
 
Join Date: Oct 2012
Region: Florida
Posts: 1,001
It is the IAC, here is why...
__________________
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
cliffyk is offline   Reply With Quote
Old 10-09-2013, 09:44 PM   #15
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Quote:
Originally Posted by cliffyk View Post
It is the IAC, here is why...
How hard is the IAC to replace? I'm far from a master mechanic but can turn a wrench. Something I can do at home?
Kuhn77 is offline   Reply With Quote
Old 10-09-2013, 09:50 PM   #16
Registered Member
Regular
 
Mfore33's Avatar
 
Join Date: Feb 2012
Location: Murfreesboro
Region: Tennessee
Posts: 540
Easy. Just 2 bolts and a connector
Mfore33 is offline   Reply With Quote
Old 10-09-2013, 09:54 PM   #17
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Quote:
Originally Posted by Mfore33 View Post
Easy. Just 2 bolts and a connector
Oh not bad at all...I appreciate everyone's help. Gonna work on it tomorrow. Thanks again.
Kuhn77 is offline   Reply With Quote
Old 10-18-2013, 04:54 PM   #18
Registered Member
Regular
 
Kuhn77's Avatar
 
Join Date: Oct 2013
Location: Ft. Worth
Region: Texas
Posts: 26
Quote:
Originally Posted by Kuhn77 View Post
How hard is the IAC to replace? I'm far from a master mechanic but can turn a wrench. Something I can do at home?
Well I went down and bought a new IAC for 76 bucks and put it on in about 10 mins....problem solved. The noise is gone, idles steady, and runs perfect. Thanks for help.
Kuhn77 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


» Like Us On Facebook



01:05 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.