Originally Posted by Clyde
Did the old engine you took out run at all? If it did maybe you left something disconnected or put a connector on the wrong place. I would start with the basics, is there a spark at the plugs? Are the spark plugs getting wet, indicating that fuel is getting into the cylinder? Can you smell fuel?
It's easy to make a mistake when swapping an engine. I did it with a Ford Focus where I connected the fuel feed and return lines to the opposite unions, the result was the engine not fuelling and so wouldn't fire. Pull the plugs out and check is the best thing.
Other things that are easy to forget are the earthing cables that connect to various parts of the engine.
This is just a basic thought, I'm no BMW guru so I apologise if you've checked these areas as a matter of course.
yeah the engine that i put on my e36 runs perfect before we took it out of the donor car, I cant really tell if i have spark because it wont turn over. I hear the fuel pump priming when i turn the key, and yes there is this 1 connector that is not connected im trying to figure out where it connects but it doesn't look its going to connect on anything inside the engine bay. This connector are by the wiring's that goes on top of the intake manifold and the Mass air intake sensor that connects to the air filter, then there is this one more connector i dont know where it goes. Thanks for replying anything right now is helpful, i dont want to bring it to the shop...