Adding engine additives to address sputtering and backfiring in a 2001 Neon may not be an effective solution. It's important to diagnose the root cause of the issue before attempting any fixes. Sputtering and backfiring can result from various underlying problems, such as ignition system issues, fuel injector malfunctions, vacuum leaks, or problems with the oxygen sensor or catalytic converter.
While engine additives can sometimes improve engine performance and reduce minor issues, they are not a substitute for proper diagnosis and repair of specific problems. If your 2001 Neon is experiencing sputtering and backfiring, it's recommended to take it to a qualified mechanic for a thorough inspection and necessary repairs.
