It starts. Will rev up to 1,500-1,700 rpm like normal, sounds normal, then will drop to idle like normal. Idle is not normal. Really rough and a lot of idle hunting going on. It almost stalls itself out. It is really erratic. No CEL and SES was on for post cat o2 sensors, but that has been an issue for months now.

I took off all the intake side of things, and put them back on. No vacuum leak i am aware of.