Re: high pitch pinging noise
That may be one source of mechanical noise. With the engine not running and cold, bang on the muffler with the heel of your hand. I discovered the innards of my muffler rattling. It created a high pitch rattling/pinging that you describe, changed with rpm's, and I thought the engine was coming apart.
Last edited by marioaz; 06-06-2009 at 12:13 PM.