Whats up guys. My dad got me a F-430 for my birthday this year and it has been a pretty cool car (except it came in much later than expected). My friend who works at the ford dealership helped me install a Nitrous Express EFI kit on the car last week. We only ran the 200 shot jets because we did not want to overstress the engine at high rpms. Everything worked fine for a few days. Now there is a weird metallic spinning sound after I let off the gas that sounds similar to a blender or something. I really need to find out if there is a quick way to fix this before my dad finds out. If anyone has heard of this, let me know what is up.