[Ruby13]

Installed LT2 intake manifold and Roto Fab now getting CEL p0106 and when I come to a stop and slow down the RPMs drop quickly to 500 and then go right back up to 1k. What is going on? Torqued to 89in/lbs and looks as if all my intake tubes are sealed. Seems to drive fine but almost tries to stall at the slow down.