ok so ive got a 88 5.7 iroc and just recently had a shop install my headers now whenever the car is cold (in the morning) i get a check engine code 15 light until the engine heats up to about 150 and then no more engine light till the next day, i ve done some searching and checked all my coolant connectors and they seem fine i also put in a o2 sensor and still the same problem is there sumting im missing here, any help would be appreciated

 

hey guys just wonerin if ne one could help me out, im still getting the ses light every morning till the car heats up to about 150 or so degrees, im thinking maybe the o2 sensor isnt getting a proper reading cuz with thses headers (edelbrock tes headers) the o2 sensor is positioned lower than the original exhaust manifold