ECU change. No start
 

It started up for like 5 secs then it died i tried taking out the immubilizer it still doesn't start can someone help me please? i cant afford to get the car flashed back to my original vin number.

can someone help me out with the stressful issue with this car it started up perfect the first time but it died after 10 secs then the security light came on i wanna bypass it so the car can start and be back out on the road any suggestions??

It needs to be flashed.

Moved to 2nd Gen Neon forum.

Yep, the security has to be programmed. It's called a "PCM Replace" procedure in the scan tool.