Nissan Repair: nissan altima, nissan altima, car wont start

Question
I have a 1995 nissan altima. motor was bad. bought a 1995 altima wrecked with good running motor. swapped it into my car. now my car wont start. NO SPARK! Has new crank pos sen. new coil and distributor. ECU is good. what is going on with this thing. It was supposed 2 be a plug and go thing in a weekend that turned in 2 a nightmare. please help.

Answer
i apologize for the delay in the answer.  i know that swapping motors on a day off is frustrating, esp when its your main vehicle, this is from experience.  having said that, an often overlooked mistake when swapping engines is having proper ground.  you might not have proper spark because you aren't grounded properly. try running mult grounds, and make sure all your pos and neg connections are VERY clean (sandpaper)esp around the ignition coil.   are you sure the cap and rotor are in good condition and the distributor is properly timed?   i wish i could give you some hands on help but i hope i can offer some help from my experience.  i hope your up and running soon, im sure its something simple.  please e-mail me when you can to let update me on your swap.  thanks.  xxp_sebby@yahoo.com.