Engine noise

Tiny
JOEY737396
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
What causes the valves to knock
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Saturday, December 25th, 2010 AT 8:34 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
If you have a bad valve ping, it can be caused by cheap low octane fuel, a bad knock sensor, or a timing issue.
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Sunday, March 13th, 2011 AT 3:28 AM

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