Join Date: Aug 2009
ssbillet is offline
Re: 2002 4.3L Vortec Timing
Yes 3,1,5 and 2,4,6 are clean. O2 sensor left side before CAT? I am going to pull it and check. Maybe when I did the work on the intake gasket cleaner and carbon made it's way down some of the exhaust ports. The truck did not start up right away so that could have caused some fuel to make its way there too.
Has anyone had this problem? I will keep you posted later today when I pull it.