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1999 Chevy Silverado engin pinging

Tiny
BARLEY79
  • MEMBER
  • 1999 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 119,000 MILES
Hi, I have a chevy silverado 1999 with a 4.8ltr v8. It has started pinging about 7 months ago and it does it under a load, while im just driving 55mph on cruise control and when I rapidly accelerate. I have replaced the spark plugs, fuel module in the tank, fuel filter, air cleaner, high octane gas, cleaned fuel injectors, used sea foam to clean out the carbon. NO DIFFERANCE AT ALL ! I questioned the timeing but the dealer says that its auto adjusted? Scanner was hooked up and there was no prob with any sensors and the check engine light has never came on. What gives? Something is causing the prob and I know it can be fixed. I just dont know how. I'm at the end of my rope. Can you help me?

thanks Randall
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Tuesday, March 17th, 2009 AT 9:52 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean and test the EGR valve and also check the knock sensor
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Tuesday, March 17th, 2009 AT 9:55 PM
Tiny
BARLEY79
  • MEMBER
  • 2 POSTS
Yes' I have already done that. There was no problem found at all
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Tuesday, March 17th, 2009 AT 9:57 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Is the engine getting hotter than normal are you using the correct type of fuel. Check the ignition timing
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Wednesday, March 18th, 2009 AT 12:55 AM

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