[twilightcall]

My car pings when going up hills quite a bit. On the road it is fine but going up a hill and giving it gas it wants to ping. Any ideas. It is a stock 5.0 HO engine 83'.

 

[Puter]

Back the timing two degrees if you are using the best grade gasoline. It is pinging under load.

 

[twilightcall]

Yes it is. Mainly when on the highway at 35 or so. When I give it gas, a good amount it will ping. On the highway around 45 and I give it some gas to go up a slight grade it will ping bad, sounds like dried leaves getting mulched up.