Question to all that might know!!!

ok... i just did a swap from a BHG to Jap engine less than 50k... the car runs good but then starts sputtering... while driving...

the person who is handling the swap ect... says its the injectors.. that they are bad... and that they need cleaning... or replacing?

how can i know for sure? or could i just be having another BHG on my hands??:1zhelp: