The pinging is caused when the fuel mixture ignites prematurely and put extreme stress on the mechanical parts of the engine.
This can sometimes be caused by a bad tank of gas. You want to fix this problem quickly, otherwise you can cause severe engine damage.
Have the mechanical timing checked, this is done by going into diagnostic mode and setting the base timing by adjusting the distributor.
Thursday, September 25th, 2008 AT 8:38 AM