Vehicles have either a carburator or injectors but not both. It's impossible to answer your question.
Sounds like a bad/failed water pressure regulator.
Your injectors stopped working because either they have failed and need to be replaced or else there is inadequate fuel pressure to open them.
The number one cause is a failed fuel pressure regulator. It is on the fuel injector rail and held on by three bolts. Other causes could be stuck fuel injectors and/or a failed oxygen sensor but the FPR is the number one reason.
It maintains the cabin pressure to the air pressure at 8000 ft. Without pressurization, you would get hypoxia (The Lack Of Oxygen) Get light headed, pass out, then possibly die. As you go higher the atmospheric pressure drops. Payne Webber the Golfer died when the cabin pressure regulator failed.
The regulator is in the engine computer, and if failed the computer will need replaced.
Which regulator? The voltage regulator is INSIDE the alternator. If that regulator has failed you can either rebuild the alternator (don't even try unless you're experienced), or you can simply replace the alternator. The fuel pressure regulator is near the rear of the engine, drivers side. Just get a new one, pop out the old one, clean everything well and put the new one in it's place.
If the window regulator cable has failed, the entire regulator will have to be replaced.
Low oil pressure or failed oil pressure switch.Low oil pressure or failed oil pressure switch.
If two injectors have failed it is more than likely that the other injectors could fail. I would replace all the injectors, or at least inspect them for possible failure
Low tire pressure or failed tire pressure sensor.Low tire pressure or failed tire pressure sensor.
The most probable cause is that the voltage regulator has failed. The regulator is an integral part of the alternator so you will probably have to replace it.
It does not have a cold start relay. It sounds more like a fuel pressure regulator has failed or the injectors are dirty causing excessive flow. Have a certified technician check for these things as they can be a little hard to diagnose without the proper equipment.