ok guys heres the deal. ran good, seemed to start a lttle hard, but may be normal, not sure, just got the car. drove it fri, and sat. sun morning installed a new radio in it. sat all day sun till early evening, got in it to leave , wont start. Has fuel, but no spark from the coil. First thought, replce coil, didnt work. i have 12v at + side of coil w/key on, and 12v on - side as well at all times w/key on ,no pulse when it cranks. Pulled crank sensor and it tests in spec(at least i think so, got info online). some corrosion on terminals, but i dont tink thats problem. I ordered a bently, but untill i get it im not sure of the relay locations. his sems to be a common problem but i have not seen anyone that has this exact problem. I also tried removing the radio(just a thought) didnt help either. is there any oter tests for the cp sensor? I have fuel, so the pumps are working? Any help you experts have would be appreicated. This is my second bmw, and the first time i had any problems like this.