I started my Max after two failures to start and it idled VERY roughly. It revved under throttle just fine, and rpms below 1000 caused the car to shake badly. At first, headlights and other accessories running caused the engine to run at a slightly higher rpm so it was fine, but turning off acessories caused idle speed to drop and the car to shudder badly. I shut the car off, thinking I'd take a closer look in the morning. I went outside to check again, and now the car will not start. Brand new battery (3 months old) and alternator (2 months old) on a 99 Max GXE. Any ideas?