Cleaning out carbon deposits - water, seafoam or other mystical products?
I've been having some vacuum and idling problems recently which I have traced back to the valves (backing off the adjustment brings back vacuum, but will result in lifter ticking, on new lifters/rods). During replacement of the lifters I noticed that the intake ports of the heads were heavily coated in carbon deposits from when it used to be running rich.
My current theory is, if I do not have bad valve seats/worn valves, I probably have carbon buildups affecting the sealing. As cleaning up possible deposits is alot easier and quicker than whipping off the heads I want to try a couple of cleaning products first.
Does anyone have any experience with these detergent products? Any recommendations etc?