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

Do you
have the same problem?
Yes
No
Thursday, February 16th, 2012 AT 3:25 AM

79 Replies

  • Tiny
  • Fixitmr
  • MEMBER

Any CEL have codes read maybe knock sensor malfunction?

Was this
answer
helpful?
Yes
No
Thursday, February 16th, 2012 AT 3:58 AM
  • Tiny
  • Vette2112
  • MEMBER

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

Was this
answer
helpful?
Yes
No
Thursday, February 16th, 2012 AT 4:46 AM
  • Tiny
  • Fixitmr
  • MEMBER

Codes are in there even if light is off now.

Was this
answer
helpful?
Yes
No
Friday, February 17th, 2012 AT 1:16 AM
  • Tiny
  • Vette2112
  • MEMBER

Its new too and still doin it

Was this
answer
helpful?
Yes
No
Friday, February 17th, 2012 AT 1:50 AM
  • Tiny
  • Vette2112
  • MEMBER

I was told maybe it jump time

Was this
answer
helpful?
Yes
No
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-

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
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

Was this
answer
helpful?
Yes
No
Friday, February 17th, 2012 AT 2:32 AM

Please login or register to post a reply.

Other Engine Ping Questions