1986 Chevy Suburban knocks and pings

1986 CHEVROLET SUBURBAN
93,000 MILES • V8 • 4WD • AUTOMATIC
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KWSTINE86
  • MEMBER
  • 3 POSTS
my 86 chevy K20 is knocking and pinging and I have never had a problem with it doing this befor on 87 octane I recently rebuilt the carb could it be running to lean or timing advanced to far?
Jun 11, 2010 at 2:54 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Hi there,

you need to check mixtures , timing, vacuum leaks, distributor operation, start here.

mark.
Jun 12, 2010 at 6:48 AM
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