FrankenStang
Well-Known Member
to me it sound like your idle stop screw was set to have ur throttleblade open to far to compensate for the mods until the chip was burned for your car,and then the idle screw WAS NOT set back down and your car began to ping because it was constantly under load and or bad gas...have the car in idle and turn down that screw until the idle in neutral or park is just under 1k, should help drivability too