whistling sound after it has warmed up, it sounds like it is coming from air filter area?

1994 CHEVROLET S-10
157,527 MILES • 4.3L • V6 • 2WD • MANUAL
Avatar
CLOWNROYALE
  • MEMBER
  • 2 POSTS
It is steady hi pitched. does not change when throttling up. can't seem to locate the problem. OBD plug in will not let me jump it. does nothing. why?
Jun 18, 2023 at 2:43 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,840 POSTS
  • ASE Certified Mechanic
Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response.

Please start a new question for the OBD port issue. Check out the images (below). Please let us know how it goes
Jun 19, 2023 at 12:57 PM
Avatar
CLOWNROYALE
  • MEMBER
  • 2 POSTS
I may have found the issue due to reading other posts... I checked all vacuum lines and found one that was detached and plugged. i do not know what it belonged on... the hose was dry and therefore the plug cracked it... I cut a small amount off and re-plugged. noise seemed to quiet down. will know more today. Thanks, and i will use that link as well to do some more research.
Jun 19, 2023 at 1:48 PM
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,840 POSTS
  • ASE Certified Mechanic
I have seen bad intake manifolds (cracked) cause the noise as well FYI.
Jun 20, 2023 at 3:27 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.