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

CLOWNROYALE

MEMBER
1994 CHEVROLET S-10
4.3L
V6
2WD
MANUAL
157,527 MILES

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?

Sunday, June 18th, 2023 AT 2:43 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,947 POSTS

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.

This guide may help as well:

https://www.2carpros.com/articles/understanding-and-fixing-whistling-noises-in-automotive-engines-a-comprehensive-guide

Please start a new question for the OBD port issue. Check out the images (below). Please let us know how it goes

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Monday, June 19th, 2023 AT 12:57 PM

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.

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Monday, June 19th, 2023 AT 1:48 PM

KEN L