[Jonnyrox]

My 2004 LS ran great only 80k miles then it randomly died and then was multiple misfiring I thought it was the coil packs like it usually is with this vehicle I bought the iridium plugs and when I went to change them saw oil on every plug the entire length of the thread still put them in worrying the whole time I was wrong and was.
I took the throttle body off and it took an hour to clean it was carbon tho not oil just wondering which direction to go next.. oh and I was nearly empty on fuel maybe injectors or filter. Please help I just had a daughter and drove her home perfectly fine first trip after this happened

 

[keylightguy]

My 2004 LS ran great only 80k miles then it randomly died and then was multiple misfiring I thought it was the coil packs like it usually is with this vehicle I bought the iridium plugs and when I went to change them saw oil on every plug the entire length of the thread still put them in worrying the whole time I was wrong and was.
I took the throttle body off and it took an hour to clean it was carbon tho not oil just wondering which direction to go next.. oh and I was nearly empty on fuel maybe injectors or filter. Please help I just had a daughter and drove her home perfectly fine first trip after this happened

OIl in the spark plug holes is usually from the valve cover. They have grommets that seal around the spark plug tube that probably need to be replaced. Not a big deal. Also, this forum is for 2021 and newer Trailblazers. Good luck with yours.