87lesabre

I have been trying and trying to get this car running, I hope someone here can help. This all started one morning when the car would crank but not start. The previous day there was nothing wrong. After cranking it for a bit later in the day it started up and ran fine. Drove it around a while, came home shut the car off, hasent started since. The computer shows no codes. From what I was reading online, I replaced the crank sensor, no result. I swapped the ECM, coils and ICM from a parts car and still nothing, there is gas but no spark. I also replaced the temp sensor. There is a new MAF on there from about a year ago. Anyone have any ideas?