A PINGING SOUND ONLY UNDER A LOAD

  • Tiny
  • vette2112
  • 1990 GMC Suburban
  • 231,000 miles

I filled up with gas and nw I have a pinging sound and chattering I have changed the fuel filter, new plugs and wires new o2 sensor new distubtor and cap rotor butn it also has a rough idle it has plenty of power

Thursday, February 16th, 2012 AT 3:25 AM

79 Answers

  • Tiny
  • fixitmr
  • Member

Any CEL have codes read maybe knock sensor malfunction?

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Thursday, February 16th, 2012 AT 3:58 AM
  • Tiny
  • vette2112
  • Member

Engine light came on for a couple secs thn went back off

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Thursday, February 16th, 2012 AT 4:46 AM
  • Tiny
  • fixitmr
  • Member

Codes are in there even if light is off now.

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Friday, February 17th, 2012 AT 1:16 AM
  • Tiny
  • vette2112
  • Member

Its new too and still doin it

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Friday, February 17th, 2012 AT 1:50 AM
  • Tiny
  • vette2112
  • Member

I was told maybe it jump time

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Friday, February 17th, 2012 AT 1:51 AM
  • Tiny
  • rasmataz
  • Member

Could be your KS not retarding the ignition timing or A stuck closed EGR valve that causing excessive combustion heat to detonate/ping-like a bunch of marbles being thrown into a tin can when engine is under load-

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Friday, February 17th, 2012 AT 1:58 AM
  • Tiny
  • vette2112
  • Member

It only does it under a load and it has a rough idle I was just maybe clogged convertor im open to anything

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Friday, February 17th, 2012 AT 2:19 AM
  • Tiny
  • vette2112
  • Member

It takes a litte more time to start in the morning mre than usual

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Friday, February 17th, 2012 AT 2:21 AM
  • Tiny
  • rasmataz
  • Member

Lets do some troublshooting here instead of describing what's going on with it -do what we have suggested then report back your findings

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Friday, February 17th, 2012 AT 2:25 AM
  • Tiny
  • vette2112
  • Member

I was told that a egr valve stuck open is bad and closed is good which is you can call my cell at 307-677-1886

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Friday, February 17th, 2012 AT 2:32 AM

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