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97 jimmy running extremely rich

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  #61  
Old 03-13-2016, 06:45 PM
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Well found the problem. Compression
1. 175psi
2. 175psi
3. 180psi
4. 190psi
5. 175psi
6. 0psi
Cylinder 6 has no compression at all.
All new spark plugs were black. So if 6 was the only problem cylinder then why are all the plugs black?
 
  #62  
Old 04-03-2016, 07:12 PM
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Found the problem. Cylinder 6 intake valve stuck open. Causing all the cylinders to run rich.
 
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