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I hope some can point me in the right direction.
I have a 1996 F-150 V-8 302 with 127,000 miles and here in the last year I here valve pinging every time I fill up with new Ethanol added gas. Now, if I add octane treatment, seafoam or fill up with super unleaded I do here it. Its mainly when I get into it to pass someone or drive up a steep hill. Could there be something wrong with the engine? What about the timing should I increase it or decrease it.