Can someone help me with these questions I have?

[yevgenievich]

the issue i have with turning off the after cat o2 sensor is the engine will throw a check engine light and make the engine not run right. as what ive herd

Ecu does not care of the post cat sensors except for checking cat efficiency. Just turn them off in the tune and no check engine light or other issues

 

[MrOverCast]

Ecu does not care of the post cat sensors except for checking cat efficiency. Just turn them off in the tune and no check engine light or other issues

Ah ok thanks. sorry for the questions i just havent been able to find information about this. another issue i have is that i cant seem to find the fuel pump connector on the wiring harness. does one of the connectors go in to a separate controller or connector that goes to the fuel pump?

 

[yevgenievich]

Fuel pump wiring would consist of a trigger wire from ecu, fuse, relay and wiring to the back of the truck. Would have to check wiring diagrams for exact wire color and placement. Earlier set up included an oil pressure switch as well, but not sure on a vortec