Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

weird running sound on cold start

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Old Nov 7, 2024 | 12:36 PM
  #21  
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From: BX NY North East
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you still have not retightened the intake manifold bolts and throttlebody? it's free just a few minutes of your time.
 
Old Nov 7, 2024 | 12:44 PM
  #22  
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NFS
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Originally Posted by bronxteck
you still have not retightened the intake manifold bolts and throttlebody? it's free just a few minutes of your time.
I been crazy busy doc with work but I’ll get it done this weekend
 
Old Nov 23, 2024 | 09:20 AM
  #23  
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I checked compression everything is fine. I took the valve cover and cleaned it and cleaned throttle body and I made sure intake manifold bolts were tight and nice. I did engine oil flush and put fresh oil. The weather been cold in Florida now and the thing went away before doing all that . But I did and checked anyway . That weird sound went away and now stating normal without that weird sound. I’ll keep an eye and update
 
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