Unlikely, air can get in around them if o ring is bad but rare. They are simply solenoid valves and fuel pressure should be well ablove 50 lbs/ if you are running lean, excessive air entry is more likely a vac hose/
Yes
Yes. A sticking fuel injector can allow far too much fuel into a cylinder.
Injector circuit open, cylinder 1. Check the connection at the #1 fuel injector if it is okay you may have a failed injector.
Means black smaoke and a failed catatlitic converter
Assuming we are talking about an Electronic Fuel Injector, in an EFI system the fuel injector opens and sprays the pressurised fuel into the engine when signaled by an Engine Control Module (ECM).
It is a part of a fuel system that injects fuel into the manifold or into the cylinder of an engine.
yes
Remove pressure from the fuel system. Remove fuel lines and the rails. Get a fuel injector puller to avoid the risk of damaging the injector. Remove the old injector and replace it.
It has a multi-point fuel injection system with one injector on each cylinder.
To measure the fuel system pressure
Stuck open injector, severe misfire, failed oxygen sensor, etc.Stuck open injector, severe misfire, failed oxygen sensor, etc.
Possible failed injector.