black soot smoke exhaust · sooty exhaust
Dark black or sooty smoke coming from the exhaust, usually noticeable when accelerating.
Check the air filter first - a heavily clogged filter is a cheap, common cause and a five-minute check.
Usually safe to drive, but a persistently rich mixture wastes fuel and can damage the catalytic converter over time.
Describe your situation more precisely (e.g. exactly when it gets worse, how long it lasts) and get an expanded, personalized breakdown.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
Thick white smoke from the exhaust
SeriousThick, persistent white smoke (often with a sweet smell) coming from the exhaust, especially if it does not go away as the engine warms up.
Blue smoke from the exhaust
WarningA bluish or blue-gray tinted smoke from the exhaust, often accompanied by a burning oil smell.
Rattling noise from underneath the car
InfoA metallic rattling or buzzing noise from underneath the car, often changing with engine RPM or road vibration.
Backfiring or popping sounds from the exhaust
WarningLoud popping or banging sounds from the exhaust, often when letting off the gas or during deceleration, sometimes with a visible flash.
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