Why does smoke come out of my carburetor?
Black smoke coming from the exhaust is an indicator that the engine is running excessively rich, or using too much fuel. A carburetor that is delivering excessive fuel to the point of producing black smoke, is not only burning unnecessary fuel, but also producing unnecessarily excessive emissions.
Can a rich carburetor cause smoke?
On an older vehicle with a carburetor, a rich fuel condition and black smoke can be caused by: Stuck or misadjusted automatic choke. This could include a fuel saturated foam plastic float, or an incorrectly adjusted float (set too low). A restricted fuel filter may also contribute to a rich fuel mixture.
What causes an old engine to smoke?
Smoke often leaves car engines as a result of overheating. This can be caused by faulty wire casings, heated residues on the engine block and overheated liquids including oil, transmission fluid and brake fluid. There may also be a fault in your coolant system, or your engine may not have enough lubricant.
Why is there blue smoke when I start my car?
The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise.
Which is the best carburetor for a Toyota Corolla?
Your neighborhood AutoZone stocks the quality carburetor for Toyota Corolla you need to get back in business today. The job of a Toyota Corolla carburetor is to provide an optimal fuel and air mixture to your engine for peak performance.
What happens when you put too much gas in the carburetor?
More gas needs added to the mixture. An engine that runs rich won’t necessarily make a change in sound, but you’ll be able to smell it. Bring the gas down some. An engine that runs too rich at idle will cause the plugs to be fuel-fouled, leading to a vehicle that is harder to start cold. Adjust both screws equally and find the right mixture.
What is the idle speed screw on a carburetor?
There is an idle speed screw that adjust the opening of the throttle plate, and an idle mixture screw that limits the flow of fuel at idle. You want to adjust this second screw. As always, consult the owner’s manual or shop guide for your make and model, if you can’t find the screws.