Exhaust Pipe Black Smoke 1.42 — Original & Pro

A leak near the sensor can pull in outside air, tricking the sensor into reading lean ( ) while the engine is actually over-fueling.

If fuel injectors are "streaming" liquid fuel instead of a fine mist, the fuel won't burn properly, causing black smoke even if the overall air-fuel ratio seems reasonable. Common Causes of Black Smoke EXHAUST PIPE BLACK SMOKE 1.42

A malfunctioning Mass Air Flow (MAF) or Oxygen ( O2cap O sub 2 ) sensor can send incorrect data to the ECU. A leak near the sensor can pull in

High pressure can force too much fuel through the injectors. the fuel won't burn properly

) measures the ratio of the actual air-fuel mixture to the ideal (stoichiometric) mixture. Stoichiometric (

If your vehicle is exhibiting black smoke, consider these primary culprits: