Okay so I am having issues with my civic sometimes not turning over. Whenever the car doesn't start, the dash lights still turn on, I hear a the main relay click along with the fuel pump priming. Also, I have checked the voltage at the signal wire on the starter whenever it doesn't start. It reads about 8 V. I believe the starter is still good because when I hardwire the starter coil to the battery, it starts up every time. I have a remote start installed on the car and I have to start the car that way whenever the key won't. Could this be the ignition cylinder?

 

Possibly.

Car information may be helpful.

 

Totally forgot to mention type of car. It's a 97 civic ex with a itr swap.