I was driving my neon and i turned on my A/C and within 60 sec it had high temps and died I let it cool down. It would not start so we tried throwing starter fluid in the intake, and it started on that but died again when it ran out. So I believe it has a lack of fuel even though i had just put in a new fuel pump a month ago. Any help is greatly appreciated.

 

I see you don't have any replies yet, so will see if I can get things started. Scan for trouble code clues & post All code Numbers, as they can help focus a trouble shoot.
If you don't have, or can't borrow, or come by a scan tool, or code reader, you can still extract codes by activating the dash message center to put up any stored codes by cycling the ignition switch from Off to On, (but don't crank the engine), three times, stopping at On the third time. Let us know what you find

 

Hello, I got 3 codes one for my barometric sensor one for my camshaft sensor and the last one was for my crank shaft sensor I replaced those and it still wont start and is still putting codes for those parts. Thank you for your assistance.

 

OK, good idea to have scanned for trouble code clues but you forgot to First post the Numbers. We need you to post the trouble code Numbers you first got & the ones you now have, as they can often give clues that can help focus a trouble shoot.
DON'T toss any more parts at the problem on a hunch, until you post the code Numbers, so the forum can see if those clues suggest further testing is needed. For example you could have damaged wiring strands, faulty wiring insulation, electrical connector pins or socket, bent pin, loose / spread socket fit, or contact corrosion on them, or a missing, or low ECM reference voltage problem, that could cause codes. Well, you get the idea, a number of Other things need to be looked at, tested & confirmed to be faulty, Before replacing parts.

 

p0129 p0335 p0340 are the codes that are popping up for me

 

BTW, Welcome to the 2nd Gen Neon forum!!!

Seeing as how you seem to like to turn your own wrenches, we have access to the Neon FSM's here 2nd Gen Neon Parts Manuals - DodgeForum.com, so in darthroush's #2 post you'd click on the Red year range that covers your vehicle, to open access to the FSM subject your working on.

 

If you've been cranking the engine a lot, trying to get it started, the battery likely needs to be Slowly brought back up to a Full charge. SO, use your smart battery charger on say a 4-6 amp setting, so it'll Slowly bring the battery back up to a Full charge. Then with the ignition in the run position, check the ECM Reference 5 volt output & post what Voltage you measure on an accurate DVM.