Yeah I just did a motor swap on my 07 Malibu Maxx 3.5 L V6 and I swapped it with another exact same car change out the computer in the inside fuse box trained on the center console inside change all that and in the car turned over and start a new one for about three seconds and then it dies out I need help to figure out how to keep it going at work and need to do to make it run and stay running and you’ll help me I really appreciate that

Do you seriously have any idea how important punctuation is? That entire run on paragraph told us nothing in respect to what we think you did. I'm wondering if you swapped out an entire car, or something about a computer in a fuse box(which I never heard of).

You need to explain PRECISELY what you did step by step. Preferably starting out with WHY you (presumingly changed engines)

Okay if you let me explain this a little better. I have an 07 Chevy Malibu Maxx that I bought from the auction for $500. The motor was blown when I got in and check it all out the motor was blown so I acquired another 07 Chevy Malibu Maxx with a good motor 126000 miles on it. So I decided I would swap out the one that I had with the good motor because of the fact that the car was beat up and I didn't really like it with the one that I have sitting in my driveway that is in great condition other than the motor being blown. So what I did was I dropped the whole front subframe transmission engine suspension dropped it off and I swapped it out both it up I also took the computers out of the old one that was beat up and then put them in the when it'* in my driveway then I'm fixing. So I like I'm trying to explain I took the computer out of the beat up one so that I could put it in the one that I'm fixing I also took the fuse box it'* in the center console on the inside of the car and left change that as well so I'm done doing everything it'* all bolted everything is plugged in the wiring is all done all the hoses and I got a new key and ignition switch reprogrammed it and when I start the motor it'll turn over and I'll turn on and I'll start and run for about 3 seconds and then it shuts off so I don't know what the hell'* going on with it but that'* why I was wondering maybe somebody can help so if you can help me I really appreciate it

Put the original computer back in.

What do u mean the one that was on the car already or the one I pulled out with the motor?

If you took the computer out of the auction car, put it back in.

Basically, the computer from your dead engine auction car needs to stay with that car. If the computer was switched with the engine swap, you need to switch them back.

The computer from vehicles of that era is looking for other components from that same exact vehicle. If it is suddenly swapped in to a different vehicle without reprogramming, it won't work.

Same engine in both cars, right?

I believe he did say identical engines. That'* why I said put the original computer back in.

It sounds like he has a "security" problem(not firing the injectors), because he swapped out the PCM.....with Global Communications, each module is looking for the same VIN number and if it doesn't "see" it, will have communication problems......so the original PCM should go back into the vehicle....