This past weekend I put in a new battery into my EG. It drove fine for a bit, then suddenly the engine started to feel like it was bogging through out the RPM range. Idle was rougher than usual and occasionally the engine cut out.

I've got a JDM B18C in there and the CEL codes I got were:
3 MAP - manifold absolute pressure sensor
&
21 VTEC spool solenoid valve

Anyone know what's wrong?

 

Focus on the MAP sensor.