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Originally Posted by jcrx
EX compression is not high enough to warrant "high" octane gas. Check you timing, retard you distributor so if it helps. Have you looked at your spark plugs?
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timing will be set today, I just wanted to see if there was an EGR valve as well.
Plugs were changed to the factory specified colder plug. Made no difference.
All plugs made the same pinging.