my friend arched the battery posts after changing the fan and plugs now the car won't run spins over fine but no fire changed the crank sensor, coil, igniter, knock sensor, and the brain off of a running car and still no fire need help

I moved your thread an lenghtend the title for better visibility..

IS the check engine light on?

Did you check for spark? how about fuel pressure. You may have blown a fuse when the battery was arched.

has plenty of fuel pressure all fuses are good no check lights on or codes when scanned

does anyone know what the crank sensor voltage should be

I believe that is 5v

no spark and only 2.8 volts when i tested voltage for crank sensor

Do you have spark at the plugs?

no spark at plugs

Disconnect the powertrain control module (PCM).
Measure the resistance between the signal circuit and the low reference circuit of the crankshaft position. 500-900 ohms