My 2005 neon will crank over but will not start. fuel pressure is good but no spark acording to the timing light.

possible skipped a tooth on timing

Check for proper fuel pressure. Without proper fuel pressure it will not start and no DTCs will be logged.

most common issue with these is crank and cam sensor.

What is the fuel pressure at the rail?
Can you measure ac voltage at the injectors?
Is there a security light flashing?
Do It Yourself Diagnosis and Repair

Has it been running since you got the new battery? If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check for fuel injector pulse. If more than one issue, check cam and crank sensor. Check theft/security where applicable.
Don't replace anything unless testing points you in that direction.

Have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure? What is the fuel pressure spec? Any applicable trouble codes? You may need to check cylinder compression?
Have you tried starter fluid? There are safety issues using any type of flammable spray. Safety is your responsibility. Some people use a little propane. I take air duct loose from throttle body, open throttle valve, spray just a little. If the engine tries to hit off the spray, it's a fuel issue in my opinion. Don't spray on any sensors.

Hello, If it just cranks and not starting at all can be several things to look at. A engine to run needs fuel, spark, compression, air. BUT here is what I would first do, if you check to see if you have spark, and fuel, most likely it could be the crank sensor. If no codes come up on dash. There is so many things it could be. Just take one step at a time. See if your getting fuel, if you smell fuel, like flooded, then its getting fuel, otherwise could be fuel pump not working, If pulling a plug and keep it in plug sleeve and set next to medal screw on block, and have someone turn key, to see if you see spark. If spark then getting spark, Then were back to a couple things.... Crank sensor went out, that will cause to crank and not start, if cam sensor went out, it would still run, but just like ****. Next if still cranks and wont start, could be the timing chain missed a slot, which means could of bent a valve or stuck valve. Dont panic yet, just like I said start with first and always fuel, and also dont forget fuse panel for fuel relay fuse or fuel pump fuse to see if good. Keep me posted as i will try and help you along the way, Mike

If it cranks good but won't start, Have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check fuel injector pulse. Check for applicable trouble codes. You need an obd2 code reader to check codes, yourself. Hopefully the code reader will check manufacturer specific codes as well as po codes.
At the ignition coil and fuel injectors, dark green wire with orange tracer should be hot with engine cranking, use a test light to check voltage. If no voltage, that leads back to asd relay. I'm not saying the relay is faulty. The computer has to see both the cam and crank sensor signals before it will ground the asd relay, if either one of those sensors is faulty, the vehicle won't start. Just my opinion.

Darien, just because it's getting good spark at the spark plug wires doesn't mean that the spark plugs are firing. Now let's get your girlfriend happy again, Remove those spark plugs, check the center electrode and see if they are worn down, if they are worn down, change all 4, Good luck, Gary