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.
You are running too rich. the mixture of fuel and air has too much fuel in it,
It means that the engine is running too "rich"; that is, there is too much fuel in the air/fuel mixture.
excessive amount of fuel, running too rich.
They are each receiving too much fuel, resulting in a fuel:air ratio that is "rich"
most likely running rich, too much fuel
running rich (too much fuel)
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.
It seems like you're running too rich of a mixture - too much fuel, and not enough air.
If your truck is dieseling or running on, it could be that the fuel is too rich. Try using a lower octane of fuel.
The vehicle is running rich. Too much fuel to the amount of air.
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).
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).