Exhaust pipe black soot. Sometimes there are specks of it on the rear of the vehicle in addition to the black around the chrome tips of the dual stock exhaust pipes. Greasy black soot means oil. Exhaust pipe black with soot. Grey or light brown means nicely leaned.
It smokes whitelight gray spits water and has a lot of soot in the muffler causin the spit to be black heres a pic of the floor after leaving the car for 5 minutes to warm up. Greasy black soot means oil. If you consistently drive short trips where the engine doesnt have a chance to warm up completely or if this is a condition during winter weather when the engine intentionally runs with a richer fuel mixture some black soot will accumulate on the. What causes black soot in the exhaust pipe.
Only show this user. Sometimes there are specks of it on the rear of the vehicle in addition to the black around the chrome tips of the dual stock exhaust pipes. The black soot is kind of normal especially with a big free flowing exhaust and no cat But your AFRs are pig rich. Michael Simari Car and Driver. Over-fueling is the primary cause of black smoke from the exhaust of a heavy duty diesel engine. Generally black soot in the exhaust tailpipe would indicate a too rich fuel mixture leaving partially burnt exhaust deposits. Your AFRs should be jumping 14ish at idle. Water usually comes out when engine is not hot enough like when starting it.