Posts Tagged: Black Smoke from Exhaust

Black Smoke from Exhaust: Causes and Solutions

Learn what causes black smoke from the exhaust after a cold start on a late-model vehicle Most carmakers have shifted to gasoline direct injection (GDI) technology to improve engine performance and improve gas mileage. GDI works by injecting gasoline directly into the combustion chamber, as opposed to port fuel injection, where gasoline is injected into the backside of the intake valves. The downside to GDI is soot formation during a cold engine start due to the rich mixture. That can result in black smoke from exhaust after a cold start. … Read More