Re: Loud Pinging/rattleing noise when under heavy acceleration, hills...
Check the fuel injector wiring connector at the injector, if any corrosion in there it can mess up the the amount of fuel injected ,ie, lean run condition, causing predetonation or ping, cleaning the connections on my old 2.3 made all the difference, it pinged from the day i bought it ten years ago and i did everthing known to man to fix it, i thought, until a buddy with a 5.0 mustang turned me on to the corrosion problem at the injector. I changed both fuel filters, cap rotor wires plugs, inspected fuel pump new eec module nothing changed until i cleaned the connections. i had to remove the top half of the intake manifold to gain access to the injectors but it wasnt a big deal. This can cause some really weird driveability problems codes etc good luck