Pinging in 2004 sohc
I have a pinging problem in my 2004 sohc 4.0. Just about any hill from 30 mph on up to highway speed causes my valves to rattle or ping. Premium 93 octane fuel solves the problem, but the engine should run fine on regular. I have about 83k miles.
2004 super cab, 4 door xlt with appearance package and 4.0 cammer V-6 with auto trans and 2wd fitted with a Leer topper. Sounds via Alpine head unit and power pack through infinity Kappa components front and Kappas rear.