Engine will not start

IMAC
It has still not shown any codes. It has about 110,000 on it.
I have not checked the fuel pressure other that relieving the pressure at the connection point for the gauge. You can hear the pump turn on at the tank fill. No weird noise just a nice even hum. I guess the next step is going to be loan-a-tool a fuel pressure gauge.

HMAC300
Update. Went out today to hook my OBD-LX to it as see if I could get any readings that would give me a clue as to what was going on. It seemed to be dragging when I tried to start it. Again, it seemed to try but would not start. The reading on the battery. Was about 11 volts so I put my charger on it. After about 10 minutes, I tried to start it again. It still seemed to try but would not catch. This time, I gave it full throttle thinking that if I could get it to run, I could make it hit the rev limiter so it could "learn" the new new crankshaft & camshaft position sensor. Well. That got it to start. I left off and it was running rough. So, I gave it some gas to hit the limiter and let off. After that it ran fine.
But, to make sure, I took it up to have the battery & alternator checked. The alternator checked out fine but the battery was bad. My son said it runs better now. Before, he said it didn't seem to have much pick-up.
I want to make sure I said thank you for you input. So. THANK YOU!

Oh well. I still think the sensor was part of the problem since it seems to be running better than before. But yes, low voltage to a computer can cause some WEIRD things on a computer.
THANX again!

I took the wiper motor and assembly out and put it all back together and now my car will crank but not start.

My LaSabre just quits sometimes when driving. Usually you can slip it to neutal and restart immediately. This has happen many times in the last year. Took it to Buick Dealer and they ran Dynostics on it but could not find the problem. Now, sometimes it refuses to start at first but than after turning inition on and off several times and trying to start it will start.