Loss Of Power

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1998 BMW Z3, 1998 BMW M3, 1998 BMW M Roadster, 1998 BMW 740iL, and 1998 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.

Insufficient fuel pressure.
Restricted fuel filter.
Restricted air filter.
Ensure engine compression is okay.
Ignition system malfunction.
Burned or sticking valves.
Restricted exhaust system.
DME/Motronic control unit malfunction.
Incorrect valve timing.