Id be looking at oxygen sensors in the exhaust system
SOURCE: 1996 dodge neon highline 2.0
IM HAVING THE SAME ISSUES WITH THE ONE AT MY SHOP! AND I FOUND OUT THAT THESE CARS ALL HAVE BURNT WIRING!!!...........NITRO
SOURCE: 1995 Dodge Neon Sitting for a Year and wont start
Your ECM is located on drivers fender up near battery . Remove battery cable first, then remove the ECM & all the connectors attached to it. Get some electrical contact spray & clean both ECM connector pins on it, and the connector itself, down in mating females. Re-install after cleaning, & remove it again a couple of times & re-install, just to help clean up the contacts. Then lets see what you get. While your under the hood, look real close at all the wiring harnesses for signs of mice chewing through anywhere. Hook your battery back up & see if you hear fuel pump "hum" for a few seconds with key just to on position.
SOURCE: 1999 dodge neon
I had the same issue and it turned out to be grounding issues. by that I mean ALL of my grounds were rusted/loose/ too small wire/ ect.
To curb this issue i had to locate multiple grounding wires on the engine and that little wire running from the ground terminal to the front cross member was heating up because so much current draw through it- after locating grounding wires, Sanding the connections and using petroleum jelly AND replacing the ground terminal and Positive terminal the issue cleared up.
The only reason i knew it was ground issues on my car was finding that one chassis ground wire heating up from just running my car.
SOURCE: 1998 dodge neon turns over but wont start
your crank sensor it is located on the back of your engine block behind the alternator check it see if it is bad
SOURCE: Dodge Neon engine turns over, battery fine but car doesn't start
the timing might have jumped a tooth. hope this helps.
Let the car sit undisturbed for 10 - 15 minutes, then try to start it. Check the owners manual if you have it. Sometimes, on various cars letting them sit awhile will allow the system to reset itself. On others sometimes rapidly turning the key from off to on, without turning to start 3 to 8 times within 10 seconds and then on the last turn to the on position leave it there until the horn chirps, at that point turn the key directly to start, or turn off first and turn to start. If all this fails, a dealer can reset the system.
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