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If the fuel is running too rich in a car, it would be a good idea to adjust the EFI or Electronic Fuel Injector (carburetor). It would also be a good idea to make sure that all of the air cleaners and oxygen sensors are clean and functioning properly.

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10y ago

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You have black smoke coming from your exhaust?

You are running too rich. the mixture of fuel and air has too much fuel in it,


What is the black smoke from the exhaust mean?

It means that the engine is running too "rich"; that is, there is too much fuel in the air/fuel mixture.


What are causes for black too much smoke of diseal engine?

excessive amount of fuel, running too rich.


What is cylinder 2 and 5 running rich?

They are each receiving too much fuel, resulting in a fuel:air ratio that is "rich"


What can cause whit smoke from the exhaust?

most likely running rich, too much fuel


Why does blue smoke come out your cars exhaust pipe?

running rich (too much fuel)


Why does your harley run too lean or rich and how do you fix it?

Simple answer: air/fuel mixture is off. Too lean means too little fuel, too rich means too much fuel. Can be adjusted via air/fuel screw on a carb or via a remap on EFI. If you make changes to the air flow, you need to adjust the fuel as well.


Why does a car blow much black smoke an consume fuel?

It seems like you're running too rich of a mixture - too much fuel, and not enough air.


Why won't my truck shut off?

If your truck is dieseling or running on, it could be that the fuel is too rich. Try using a lower octane of fuel.


What does black smoke from the tail pipe mean?

The vehicle is running rich. Too much fuel to the amount of air.


What does it mean when a car is running to rich?

If a car is running too rich, the air to fuel mixture is not right. Running rich means that there is too much fuel (gas) going into the engine for the amount of air going in. On the opposite side, too lean would mean that there is not enough fuel going in for the amount of air. Cars can run rich when the oxygen sensors go bad, or on older cars, if the carburetor is not adjusted properly. Running rich can be accompanied by a distinct exhaust smell, and in the extreme cases, some blue smoke. The inside of the exhaust pipe will be black if a car has run rich for any amount of time (when it's cool, take a light colored rag and wipe it inside the end of the tailpipe-if it comes out black, the car is probably running rich).


What does it mean if the spark plug is dry and white?

Dry is good, but white is bad! It means that the engine is running lean, which will result in the engine running too hot and can cause serious engine damage (even seizure). Below is a guide to reading the spark plug color. Black = Rich. The fuel/air mixture is too rich (too much fuel, not enough air). Tan/Brown = Normal. The fuel/air mixture is correct. White = Lean. The fuel/air mixture is too lean (too much air, not enough fuel).