Running Lean

DiscoArt

Well-known member
Nov 14, 2009
97
0
I pulled my exhaust last night and passenger cylinder bank is running lean. There is no carbon inside the exhaust at all. The plugs look all the same and there is no coolant consumption. Now, my exhaust manifold is cracked so I wonder if extra oxygen gets in through the crack and heats up the exhaust gases enough to burn off all the carbon. I am also getting P1415 but the air pump system is working fine, I tested the valves and the pipes all hold pressure. Any ideas?
 

DiscoArt

Well-known member
Nov 14, 2009
97
0
I am thinking maybe the ECU is bad. I am going to swap the O2 sensors side to side and see if the other bank starts running lean (the O2 sensors are almost new). If I get a used ECU will it need to be coded or is it going to work as is?