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That's enough miles for it to possibly have some carbon buildup in the heads.Ohh boy....1995, GMC Yukon 5.7 TBI with 230,000 miles.
You think the reason i'm hearing it towards the rear is the pinging noise is traveling through exhaust?
Adjustable fuel pressure regulator running about 14 PSI.
MSD 6A ignition.
87 octane
Timing is at 0 degrees.
NGK gaped to I think .035 and running 1 step colder.
No oil burn...just rear main seal leak.
Runs like a champ...plenty of get up and go and still pulls hard for having 230k.