Yes.
no no
maybe this would make more sense in your native language?
well if it cranks and runs the coils are ok the 02 sensor will make it run ruff and use more gas
no
The knock sensor retards the engine timing when there is a knock or ping detected. This will make the car a little sluggish. It is rare that the knock sensor goes bad.
will a bad crank shaft sensor make a 2005 chevy equinox not start
Yes.
Fuel speed sensor? Try again, need more info.
A bad o2 sensor could confuse the cars computer. This can make the computer to send wrong signals to the engine, resulting in the engine not running properly.
they are really bad and they can kill
No. If the sensor goes bad the ECU will use default values and turn on the 'check engine' light. It should still run smooth, but will use more gasoline.