Hi All,
I am looking for some help with my 2002 Oldsmobile Alero 3.4 we bought this car for my 17 year old daughter about a year ago, it has 68,500 miles on it. About 6 months ago it started having intermittent starting issues. The car always starts but sometimes it will take 10 times of turning the key to start. The engine always cranks but we can't seem to get to the bottom of the issue. Here is what has been replaced:
Fuel pump and fuel pump relays
Both Crank Shaft Sensors
Cam Shaft Sensor
MAP sensor
ECM control Module
New Battery and New Alternator
Fuel pressure regulator
Replaced the ignition and ignition switch
Replaced the spark plugs

Any suggestions?

Have you had the car professionally scanned for codes? Did you replace the fuel filter? It would be interesting to know what the fuel psi readings are.
Have you ever seen the security light on? There seems to be issues with the pass lock system on many of these.

The car was professionally scanned and no codes are thrown at all even while the car is failing to start. Fuel filter was replaced. The fuel PSI is reading at 49 psi when first starting the car.

Wish I could be of more help,I'm not an electrical specialist.
Back to the pass lock system, so many mentions about issues with this car. It needs to be investigated.
Are you using the original GM key? Have you seen the security light on or ever flashing?

You likely have an issue that is wiring and not a component. You need to determine what is failing. Does it have spark when it don't start.