There is a popping noise when driving or idling?

Tiny
TIMAPRIL
  • MEMBER
  • 2004 GMC SAFARI
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
Sounds like it's under the hood somewhere.
Thursday, February 9th, 2023 AT 12:23 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Hi,

Does the engine seem to still be running properly? Has the check engine light turned on while the engine is running? Is the sound louder with the hood opened? Is there anything that changes the speed of the noise or intensity? For example, if you rev the engine, does the sound change?

If possible, record the sound and upload it for me to hear. That may be helpful. Also, check the serpentine belt to make sure it isn't coming apart and a frayed portion is hitting something.

Let me know.

Joe
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Thursday, February 9th, 2023 AT 4:21 PM
Tiny
TIMAPRIL
  • MEMBER
  • 2 POSTS
The longer I let it sit running the idle is getting rougher and shakes pretty good. It's not popping while idling right now but giving it a little gas here and there. The RPMs go down low after you let off and builds back up.
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Friday, February 24th, 2023 AT 9:35 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,217 POSTS
Hi,

By chance, has the check engine light stayed on while the engine is running? Listening to the video, it sounds solid.

By chance, do you have or have access to a live data scan tool? If you do, when the engine is at operating temperature, check the short-term fuel trims and let me know what they are.

Let me know.

Joe
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Friday, February 24th, 2023 AT 8:48 PM

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