Whoa Nellie. STOP! Don't change parts. FIND the problem first and diagnose it,
or you'll spend more in parts and repairs than the car could ever be worth :).
Pinging could be bad fuel, too low of an octane of fuel, bad brand of fuel
(some do it worse than others), timing issues, or EGR problems.
I'd start with the fuel quality/brand selection FIRST and see where that nets
you and then go from there.
Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director
'80 Carousel Red Turbo T/A, 26k orig.
'79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig
'84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 141k and still going....
'80 T/A project car...
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