car is sputtering need help?

[nissan240]

i just got my ka24de swap done. the prob. with the car is that it sputters. engine was recently rebuild also. tried changing mafs, checked for vacumm leaks, spark plugs but it didn't solved the prob. at all! any ideas guys! would really appreciate it. btw i am new to the forum! nice to meet you guys

[slider2828]

So I assume there is 0 vacuum leaks now and that it is holding pressure? Did you check timing? What did the spark plugs tell you when you pulled it? run the engine again, pull the plugs, and look for a guide on the internet that tells you what the plugs tell you..... Its easy to find....