Dirty injectors ( irregular spray pattern, fuel comes out in a stream instead of a fine atomized spray) that will sure to make the car run ruff and run richĤ. if the sensor is bad the computer miscalculates and most likely will inject more fuel than needed ( car runs rich)ģ.
C230 KOMPRESSOR 2004 IDLE CODE
Is your oxygen sensor working properly? ( Check your OBDII fault code at pep boys, It might not be enough to turn on the engine check light but might still register a pending fault code) The engine computer uses this sensor to check how much O2 is in the exhaust and adjust the fuel accordingly. By design most cars are programed to run rich when cold to get the catalytic converter up to proper temp fasterĢ. Is your car fully warmed up when you take the emissions test? It has to be at normal operational temp. You said you car is running rich ( more fuel than air) so we have to look for things that would make a car run rich.ġ. You see with a vacuum leak, unmetered air is getting into the engine without passing through the air mass sensor, therefore the computer can't account for that unmetered air and can't calculate the correct fuel trim hence more air than fuelĪnd the car runs lean. If you had a vacuum leak at the throttle body you'll be running lean not rich as you are now. Hmmm, so what you're saying is it idles ruff but passed that part of the test and runs smooth off-idle but fails that part because it's running too rich ( too much fuel).
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