post #1 of Old 04-24-2013, 06:20 PM Thread Starter
Registered User
Join Date: Jul 2012
Location: Aurora
Posts: 38
Air Intake Noise

Ok crew,

After further investigation it seems that the woooof woooof woooof noise I have been hearing is coming from the air intake system. I did replace the TPS and AIC recently. It is a consistent and repetitive noise. You can only really hear it when stopped. Truck still runs great. Any ideas on how to fix it or what it might be?

1998 GC Laredo L6 with 192,000 miles

SAbbott812 is offline  
post #2 of Old 04-24-2013, 07:00 PM
Registered User
1997 ZJ 
Join Date: Mar 2012
Location: Tunkhannock
Posts: 700
Just a guess, try doing a compression test. My reasoning is if you have a leaky intake valve, it would make noise in the intake system.
Maybe check for vacuum leaks with a can of carb cleaner?

My cylinder head overhaul:
My transmission overhaul:
gearheadnick is offline  
post #3 of Old 04-24-2013, 07:25 PM
Registered User
1995 ZJ 
Join Date: Dec 2010
Location: Norman
Posts: 2,340
Did you take the intake tube off the throttle body and listen for the noise at/in the throttle body? I dont think I ever heard an exh manifold leak like you described but since its right under the intake and notorius for leaking, you might check that too.
jnicewan is offline  
post #4 of Old 04-24-2013, 09:38 PM Thread Starter
Registered User
Join Date: Jul 2012
Location: Aurora
Posts: 38
Ok, after further research, (I used the tube test.) you can hear the noise on the intake but there is no tick or knock. I cannot hear the noise on the butterfly. I found that the plastic piece on the power steering pump is the loudest source of this wooof wooof noise. Then it is slightly quieter on the metal part and quieter than that on the manifold. It appears to be a pump noise coming from the power steering. Odd but, my hearing is very good and I am constantly hearing noises that other people don't. Does this sound like a viable situation?
SAbbott812 is offline  

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

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 On

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