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Q: can i install a used ecu in my car? will it run if it is from the same year make on 2002 Pontiac Grand Prix

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my car will not crank. i am told that it is the ecu.
my neighbor has a car that is exatly like mine. will the ecu run mmy car?
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Have the basics checked before swaping parts. Fuel pressure, ignition fire, injector pulse and compression! VATS also. Computer is the least likely suspect for a no start condition, possible but not likely!
i have checked fuel pressure,45 psi, changed crank poss. sensor, changed ign module and coil pack. it is getting good spark from plug wires. tps checks good. it is not getting correct voltage to injectors. (I think.)
shows 10 volts to injector when cranking if you check the injector wire. cannot get to the injector plug at injector to use a noid light without pulling the intake manifold. the security has been bypassed with a pro bypass module. so ecu is next in line. any info will be appreciatesd.
Greg, i apprecite your answer and response. i bought the wrecked 2002 pont gp and i did install the ecu. i also had to install the map sensor along withn the computer to make it run.

after i installed both as a unit it ran. thanks! jm
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