94 altima won't start
my 94 altima had problem of stall when hot, and sometime won't start until it is cool down. Most recently, it won't start any more, It cranks and no spark out of plug(even out of coil). So I replace the Ignition module(transistor, it could be related to stall problem when engine is hot) and still have no spark(actually, a little spark came out when stop crank). I also test the coil, measuring resistances and manually make it fire the sparks. Pls help me how to further diagnose the problem? (ECM code 11 and 21 shown).