Diablo 392 cam help

Long story here but did a MMX max effort cam install with all the hardware also phaser limiter and long tube headers. Install went good which I have done before. Started car and idled fine but would die coming to stops. Tuner tried everything he could and car continued to die. Never got any codes or anything. So I pulled timing cover off and reset timing and I know for a fact it is dead on. I did how ever reuse the cam bolt and the rock arm bolts. I did not pull the heads but did a compression test and all cylinders were 200 to 210 so no bent valves from previous issues. Got car back together and sounded great and drove perfect, did get 2 codes p0171 and p0174 and noticed a high idle like 2k only in park. Next Day and car wont even idle without the help of giving it throttle. I am at a loss here and my tuner is at a loss and says everything looks great within the logs. Spark plugs are really black but new plugs did not change anything. I need some help before I give up.

Everything you are explaining points to the tune not being correct

And so we need both tunes....