2002 Dodge Neon Q&A
2002 Dodge Neon Question: My Neon rpms rev to 5000 when I start it. It accelerates on its own.
It sounds like you have a vacuum leak on your engine intake system. This could be as simple as a hose that has come off the nipple or a cracked or broken hose. A qualified technician should be able to verify this easily. - Johnny Mopar