Define flooding.
- Black smoke out of the tail pipe?
If the fuel return line is plugged,it will flood.If the fuel pressure regulator has lost its vacuum signal ,it will flood.
If there is a large vacuum leak,the O2 will see a lean condition and cause the rich condition.gas mileage will suck,big time.
This "flooding" happens when the engine is cold? ONLY?
Be sure the air filter is not clogged and the PCV is not plugged up solid.
Also,there are a few tubes from the valve cover that vents oil vapors into the air filter housing.
During this flood mode,hold the pedal to the floor and shut the engine OFF-it should NOT keep running.(Leaky injectors)...
Do this when engine is hot and cold.
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