[ImperialCrown]

Welcome to Allpar. Does the car have the gray SKIM ignition key? If so, the 4-digit anti-theft SKIM code would have to be entered into the new PCM to make it start.
Any fault codes? What diagnosis of the old computer deemed it a failed component?

 

[victorG]

thank you for the reply. i don't think it has a anti theft key because we don't have the original keys. i bought the car as a first car for my daughter from a used car dealer a couple of years ago. i scanned the old computer and it was telling me the O2 sensors were bad, so i changed them. the car started right up after that, it ran fine for a day then while driving again it just shut down again.

 

[ImperialCrown]

Did the O2 sensor fault codes return?
Use OEM sensors only, I have had problems with new Bosch sensors.

 

[victorG]

bank one had a high voltage reading and bank two had no activity at all. i replaced with OEM but they were made by bosch

 

[chuzz]

I've not read much good about the Bosch 02 sensors, but have not ever used one personally, so can't offfer an unbiased opinion. Just do a search here and see what fellow mopar owners say about them.

 

[ImperialCrown]

The I-4 Neon only has Bank 1, there is upstream (1/1) and downstream (1/2).
I avoid Bosch O2 sensors after the runaround they gave me. "But it couldn't be the O2 sensors, they were just replaced with brand new ones". Guess what, they were Bosch. If they aren't that old, take them back.
Use Mopar, NGK or Denso, etc.