Richard.The noise only happens first time I start it in the day.It is deffinatly comeing from the Engine compartment.The engine can not be made to give forth the sound,just by giving it more gas while not moving.When moving,And you pat on a little gas.You get the noise.At first I misdiscribed it.As a pinging sound.It is more of a light knock.no You cannott feel it.In three our four minutes the sound goes away.Let me reinterate No noise when not moving,no matter how you rev the engine.With so many people trying to help me I wish i where more articulate.But noticeing my spelling Its obvious I am somewhat limited in communicative ability.Thanks again.Michael