car came in for smoke at cold start when i brought it in i puled spark plugs and #2 plug had bad build up on it then i put bore scop in and saw piston was very saturated and had low compression also had build up on #4 and 6 but compressin test ok any ideas...

FIX posted 3/20/2018

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle