Engine won't start?

Christinate, did you tell them you needed soft/theft system codes pulled?

If you are saying the battery is new, yet the car turns over slowly, then remove and clean all battery connections.

If problem persists, remove starter and have it bench tested at most autoparts stores.

Starter access is best under car. It is located where trans and engine attach.

The starter has a large wire from battery attached to it and solenoid switch.

Disconnect negative battery cable before removing starter.

Is it cranking over and w/n start? If so do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
belt/chain.

Check the fuel pressure if its within specs and if the injectors are pulsing

Did you actually check the fuel pressure with a gauge if so and its within specs-and you're getting spark-time to check the valve and ignition timing as suggested earlier.

Is the security light on and blinking
if so turn key in the ignition switch to ON and leave it until security light go out and stop blinking
it may take 10 or so min

Welcome to the forum, are you saying the starter won't even crank? Or it cranks good but won't start?

Did you check the small purple wire at the starter solenoid, with the key in the crank position, that circuit should be hot. If it isn't hot, possibilities, neutral switch-- ignition switch-- wiring circuit. Do you have a theft system?

If there is good voltage and ground for the starter, and no starter action, you might remove spark plugs and accessory belt, see if you can turn crank by hand.

If you would unplug the mass air flow meter and then start it and see if it starts and idles. The mass air flow meter is between the air filter and the throttle body. Let me know how it goes.