CONTENTS
LIGHT TAN, GRAYISH-WHITE, OR RUSTY COLORED DEPOSITS 
GRAYISH-BLUE SMOKEBLACK SMOKE
CONDITION(S)
- BLACK SMOKE FROM TAILPIPE
- BLACK SPOT OF SOOT ON DRIVEWAY DIRECTLY UNDER TAILPIPE
- CLOUD OF BLACK SMOKE APPARENT WHEN FIRST STARTING CAR
- GAS MILEAGE HAS DECLINED; ENGINE LACKS POWER AND MAY STALL AS IT WARMS UP
- ENGINE MAY ROLL OR LOPE (MISS)
- ENGINE IS FUEL INJECTED
POTENTIAL CAUSE(S)
CHECK THESE FIRST:
1. CLOGGED AIR CLEANER FILTER
Replace air cleaner filter.2. FAULTY OR MALADJUSTED CHOKE; CONFIRMED IF BLACK SMOKE APPEARS JUST DURING ENGINE WARM-UP
Have choke professionally serviced.CHECK THESE NEXT:
3. CLOGGED CARBURETOR AIR BLEED
Have carburetor air bleed professionally cleaned.4. HIGH CARBURETOR FLOAT LEVEL
Have carburetor float level professionally adjusted.CHECK THESE LAST:
5. FAULTY FUEL PUMP
Have fuel pump professionally replaced.6. UNBALANCED CARBURETOR FUEL/AIR MIXTURE
Have carburetor fuel/air mixture professionally balanced.
CONTENTS LIGHT TAN, GRAYISH-WHITE, OR RUSTY COLORED DEPOSITS GRAYISH-BLUE SMOKE