HEGO problems
 

Hey everyone, been awhile since my last visit. Been struggling to get rid of my hego not switching code. I replaced it last week, but am not entirely sure that the plug is pinned correctly. The sensor has 4 wires, black, grey, and 2 white. the vehicle side is blk, ground, grey/yellow, hot in run, grey/lt. blue, pin 29 at ECM, orange to pin49 at ECM. I'm not sure how to check the sensor to figure which wire goes to what. I have even tied finding another truck to compare it to, no luck yet.

https://www.therangerstation.com/for...7&d=1347655792





DOES THIS HELP

That's one half of the problem. I am going to chase the orange and gray/yellow back to EEC, make sure I have continuity. How would I check the sensor side of the plug, it could be they give me the wrong sensor.

are you running an efi setup that needs this type of o2 sensor? because our stock SD would use a different o2.

I'm using the factory type EFI standard issue 1991. I haven't had time yet but I want to check the orange wire to make sure it has continuity all the way to the EEC. Yesterday my speedometer gear stripped in the cold weather so now getting a code for no VSS signal now as well.