Originally Posted by 360view
Mopar’s official brown foaming spray has worked very well for me, including on heavily carbon’ed up EGR passageways.
It makes a huge cloud of black smoke.

https://www.morris4x4center.com/mopar-combustion-chamber-cleaner-13-oz-aerosol-can-4318001ad.html



I used a can of this on my old Ramcharger to try to get it to pass the NOx emissions when they added that in the DFW area. It cleaned up the piston tops well from what I could see through the spark plug holes. You might have to put in new plugs after cleaning it out.

Floyd Lippencott IV