Originally Posted by ///M325i
I checked the spark coils/timing and they seem fine and I know for sure its not a fuel issue either. My fuel pump is fine. I'm not too sure what you mean when you say vacuum there is a possibility the "vacuum" could be the problem but i don't know where or what it is or does. The reason why I say there is dirt in the engine is because my intake filter fell off while I was driving (don't even ask me how lol) and I didn't notice for quite a while. After it fell off and i had noticed, I didn't drive the car for about a week waiting on the filter and when I tried starting it the whole rumbling and shaking happened. Any possibility you know how to take off a intake manifold on a 1994 325i?
Given your descriptoin, I would take a closer look at your MAF sensor and any vacuum lines around the intake boot.