What it comes to a diesel engine, what does the term “wet stacking” mean?
Generally when a diesel engine runs much below its rated output i.e. at about 40% to 50%, the fuel is not burnt completely and this passes on to the turbocharger. Operating a diesel engine with less load for prolonged periods causes the unburnt excess fuel to carbonize the various parts on the exhaust side. This disrupts the fuel spray pattern by carbonizing the fuel injection tips. This can be remedied by running the engine at full output for a couple of hours. This will burn out the excess fuel.
