Mechanics

CHEVY KNOCKS AND PINGS

1986 Chevrolet Suburban

Engine Performance problem
1986 Chevy Suburban V8 Four Wheel Drive Automatic 93000 miles

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?
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Kwstine86
June 11, 2010.



Hi there,

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

Mark.

Mhpautos
Jun 12, 2010.