2002 Trailblazer wiring question

[civicmindedex79]

Been looking at and kinda working on a 2002 trailblazer 4.2 inline 6. Somebody has run a seperate wire to a terminal on #2 coil. Wondering if anyone has a wiring diagram or knows which wire does what? Also does anyone know if these motors have a seperate coil harness kinda like the LS motors do?? Assuming someone had a problem in the past with one of the wires and just put a jumper wire in it. Showing a misfire on that cylinder but only does it when its cold. After motor warms up doesn't hardly ever if ever do it.

 

[grcthird]

Swap the coil to another cylinder and see if the misfire moves. I'll try to look at a diagram today.

 

[civicmindedex79]

Already done that. It did not. Which is why I am assuming whoever rigger jigged the homemade **** is not right. I would greatly appreciate the diagram. Do you know of this motor has a seperate coil harness?? Might just replace the harness if it does.