my 97 buick lesabre cranks but no start obd2 says p0102 mass or volume air flow circutlow input

Try starting with the MAF disconnected....

If it starts tap on the MAF sensor and if the engine stumbles or stalls the sensor is bad.

wont start at all..put that sensor on 6 months ago new

just cranks then sounds like its suck air when I turn key off

Take and put your hand over the throttle body opening and have someone crank the engine. Should such hard on you hand. You could do a cranking vacuum test if you have a gauge.

p0102 will not cause A not start you got either A fuel pump dead Or A crank sensor My Money is on the fuel pump that would be the two most common issues

I will try crank sensor its getting fuel

Did you try starting with the MAF disconnected?

If that doesn't work, spray carb cleaner into the intake while some one cranks the vehicle......if it starts and runs as long as you spray, it'* fuel delivery....

If it still does not start, check for spark.....

Why not test for spark? If you have a tach see if the tach registers during crank, if so the crank sensor is OK. If you have spark and no start try spraying some alternative fuel into the throttle body and see if it starts.