2006 ford f350 6.0 304,000 miles:
Check engine light comes on shows 3 injector codes. Fixed problem by loose connection at ficm (this happened a while back). This time it shows same codes, but there is no lose connection, and he changed 2 of the injectors. It trembles when he starts it up and fills parking lot with black smoke. He is stuck in Ky. until he gets it fix and having to sleep in his truck is cold.
If he unplugs injector will it shut off fuel to that injector?
What happens if the fimc is going bad or is going out?
What would happen if you took the catallic converter off?:scare2

 

Unplugging it is not something I'd advise with it running..

If the tip is leaking raw fuel or blown off, it will cause it to black smoke, you might have a stuck injector, but do not unplug it.

If the FICM is going bad, you'll notice a rough idle, malfunctioning injectors, the works.. The thing a FICM does is send voltage to the injector to tell it to fire. IF the voltage is low, then the speed of the fire is going to be slow if not low enough to not let it fire. Test your FICM, it should be between 47-49V and never fall below that when they key is on, when cranking and when running, if it ever falls below that, it is going bad.

If you take the cat off, it will make it louder and maybe 1-2HP gain, also throw a code if you don't have a tuner to delete it.

 

Taking the cat off wont throw any codes at all, there's nothing in the form of any sensors hooked up to it. It's fine to remove.

He really needs to test the FICM on that truck.

If the nozzle is cracked on the injector, it's likely it would leak fuel even with it unplugged.

This is Mike from the facebook page btw.