Rough Or Unstable Idle
WARNING: This page does not describe the selected car, but rather 37 other vehicles, including the 2004 BMW 760i, 2004 BMW 760Li, 2003 BMW Z8, 2003 BMW Z4, and 2003 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
- Fouled spark plugs.
- Burned or sticking valves.
- Intake manifold air leak.
- Incorrect valve timing.
- Ignition system malfunction.
- Fuel injector not operating.
- DME/Motronic control unit malfunction.
- Blown head gasket.