What would make make your car ping all the time?

Possibly knocking valves, incorrect ignition timing, fuel injectors in need of cleaning or replacing, worn or improperly gapped spark plugs, worn or damaged ignition control module and/or ignition coils, vacuum leak from a hose. Before even going to a shop, try running your car on just premium fuel for the next couple of fill-ups and see if that doesn't help dramatically. You can also add a bottle of fuel injector cleaner to the gas tank, or an octane booster. If these options don't fix the problem, try checking the spark plugs and wires for wear and tear. If you're going to replace the plugs, I would go ahead and replace the wires as well, and vice versa...anything more serious than that would probably be best serviced by an experienced mechanic. Hope this helps!