Is it normal for a 225 to...

70DartSedan said
It does not make it at idle or when moving when the accelerator is not pressed (at idle, in gear) does it in forward and reverse.

So it only makes it when power is being put to the wheels? Could it be driveline related? How positive are you that it's coming from the engine?

What happens when pressing the accelerator while in neutral? If nothing, then perhaps take a look at driveline. U-joint?