quick question- the seafoam treatment that you speak of what is this and do you know if this is something that can be done your self and if there is any web site describing the proceedure? ThanksRaybo said:It pings because of the poor shape of the 3.0 combustion chamber.This is very well known. The shape and or poor combustion leads to very bad accumulation of soot which causes run on/pinging. It really helps to lower the engine temp as the 180 degree thermo mod is very popular. Did it to my 2001 3.0 and it cured my pinging. The seafoam treatment has good results too but have not done it myself. It is usually sucked in through the brake booster vac line and cleans out the chambers of soot. Somewhat tricky procedure but very popular.I would first try the 180 degree mod.