Anybody knows, if it is possible to start this engine, just ECU module?

You mean without the BCM(security)?

If you can get the PCM tuned to turn off security, then yes, you can run a 3800 barebone with just a PCM.

Hi Mike
Just a little information, I bought a hot rod with this engine, but it is working without BCM, then the last owner installed an additional ECU (working with PCM), trying to solve the problem. He got start the engine, but it is not working very well, then my question about How to start the engine without security system. Where could I find the PCM tuned?

there are severl places that do 3800 stuff, zzp for example, but i think you could get it done cheaper if you find someone local to you who has hptuners.

So, I´m in Brazil, we have low quantity of car with this kind of engine. Some guys that work with that, told me it is impossible to eliminate the code of PCM. Then I need a solution outside of Brazil

different story i guess then. you will have to send yours to be "tuned" (they can take the security out) or buy one that is already tuned to run without security