pinging noises

When i drive my truck right now, I get a pinging noise coming from the engine. It started a couple days ago, and it only happens when i am driving, pushing the gas, when i come to a stop it stops.... should i change the fuel filter, or maybe spark plugs, or maybe the pcv..... can anyone please help me?

sounds like a bad tank of gas to me .... or water in the gas

Sounds like gas to me too. Run the tank down a little and top off with premium and see what happens. I have a 2001 Dodge 1500 with the 3.9 six and have to use 89 octane during the cold months to keep it from pinging. Once the weather turns warm the pinging stops.

I tried several things.... first I thought it might be water.... so I put in 2 bottles of Iso Heet.... that didn't work, then I tried premium gas with the Iso Heet... that helped a bit, but sometimes it still keep on going.... so I changed the fuel filter.... and now it does not go ping-ping-pong! I don't understand it, I had alreadly changed the filter before 10, 000 kilometres and already it is crap... aren't they supposed to last for 50.. or so kilometres? oh...well...no more ping-pong....

what is making the pinging noises?