Ok guys,

Here are my codes P0420, P0146, P0147.

By the way, we threw a used fuel pressure regulator in there and that didn't help either. The light still came on after driving 35 miles and stopping at a traffic light.

 

i had that problem but mine got fixed when i put a tube back on its metel tibe. mine was behinde the engine. most likely differant but what the mess