Crank but will not start

What happens on these cars is sometimes when you reconnected the battery the system will have a voltage surge which will pop a fuse or a controller. Lets start by checking he fuses. Here is a guide to help along with the fuse panels. Also, check the control module relay.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

This guide can help as well.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

Cheers, Ken

Good to hear, please use 2CarPros anytime. We are here to help.

Cheers

" I accidentally disconnected something from the air filter" is pretty vague. Can you maybe upload a picture of what it is? Also, look around the air intake tube and the filter housing for anything that looks disconnected.

To diagnose the no start, you need to find out what is missing: fire, air, or fuel. I would also check the timing belt to make sure it's turning. That's located in the front of the motor, usually under a plastic cover. Pull the two or three top screws or bolts and carefully pull the cover away from the block and have someone crank the engine over while looking to see if the belt turns.

To check for spark, remove a spark plug boot from one of the plugs and insert a #2 Philips screwdriver in it, holding the screwdriver near a metal piece of the engine while someone cranks the engine. You should see a strong blue spark. Smell and feel the spark plug to see if there is gas on it.

Remove the air filter and make sure you can see through it when holding it up to the sun. Tap it against the ground to remove loose dirt and debris. Check the inlet hose to make sure it isn't obstructed.

Turn the key to the run position and listen carefully when you do it. You should hear a click and hear the fuel pump energize (it sounds like a whirring sound). If not, you may need a new pump or pump relay.

I am not seeing any new photos. What I can see is a vacuum line with a check valve, but it looks to be connected.

As for the no start condition, check for spark: Pull one of the spark plugs, insert a Phillips screwdriver into the plug boot and hold the metal portion near something metal as someone else cranks the engine over. You should see of hot white spark.

P0300/0303/0304/0305

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

P0172 Rich condition

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.

Check the mass airflow sensor and airfilter along with breather.

I also listened to see if the fuel pump engaged when the key is in the start position and I could hear it.

It could be coming On but is it producing the correct fuel pressure and also are the injector/s pulsing-Check the fuel pressure and comeback with the readings we start here-

Check battery and make sure it is fully charged first.

Fuel pump okay, timing belt okay all you need now is spark from the ignition to have a combustion