Got the car put back together after doing head gaskets and started it up and it was idling fine when all of a sudden my afr guage spikes to 18+. I figure no way so I go have a look and fine the passenger side exhaust glowing red behind the cat. ???? What should I look for? Car was fine before. Oil pressure guage doesnt work now as well. It pegged itself.

Fuel pressure is fine gauge is last in line and reads 61+

 

Vacuum/intake leak maybe. Assuming your A/F gauge is working correctly.