My car is cranking but it doesn’t start. I didn’t drive it for a few days so I’m confused as to what could’ve gone bad because this is the first time it’s done it. No codes popping up. Battery is good, I tried another battery just to confirm. When I turn the key to (on II) I can hear the pump doing something so I don’t think is that. I checked the spark plugs but they are fine. What should I troubleshoot, and what order?
I gotta note that I installed an aftermarket radio and hardwired a dashcam about 3 weeks ago. That’s why my first thought was that the dashcam or radio drained the battery. Any help would be greatly appreciated !