RepairPal Certified shops can diagnose and repair your 1996 Nissan Quest. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
It sounds like you may have a Idle Air Control Valve going bad. They control your idle speed and only your idle speed. We would be happy to inspect it for you at no cost if you would like. Just give us a call at 562-802-1332 to set an appointment. I hope this helps.
Steve Bazar
Your Car Specialists