Alright, I bought this 1994 325i with 145,000 miles on it. At the beginning of the winter and even now the car either idles like it's coughing or when I drive, as the engine is carrying the workload it feels like a cylinder is out. So far I have been shown how to test the ignition coils and I know that one is in an working-but-mostly-non-working condition. What I want to know is if there may be something with the fuel pressure or some faulty censor that is causing the engine to work poorly as the car accelerates.

Also, any good links to getting the sun roof unjammed, looks like the previous owner tried to fix it too by the looks of that hex tool in the trunk. Thanks!