TTCUPS Posted October 20, 2004 Share Posted October 20, 2004 i have a 94 sc400 189k miles on it,when i get on the gas hard there is a pinging noise or chatter that sounds like a valve adjustment. its not a fuel problem i dont think,i use 93 octane. at idle it is quiet. is this a trait of this motor? do the valves need adjustment? can i drive it like this without a problem? thanks to all who respond. ttcups Quote Link to comment Share on other sites More sharing options...
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