1fast98LS1

What's up guys I need some help diagnosing a problem im having. It all started after I swapped an ls6 intake. Car runs like complete ****. It will run normal for a bit then just start to idle bad and lack of acceleration. I have checked the intake for cracks nothing I replaced the map sensor, tps sensor and new gaskets in the intake and throttle body. Cleaned the tb as well. I used carb cleaner to see if there were any leaks and nothing. I replaced my spark plugs as well and used some injector cleaner. No luck yet. Any ideas?