What would high HC normal to low co2 and high O2 indicate?
High HC, normal to marginally low CO, and high O2 indicates a misfire due to a mechanical engine problem or ignition misfire. Normal to marginally high HC, normal to marginally low CO, and high O2 indicates a misfire due to false air or marginally lean mixture.
How can I lower my CO emissions?
Alternatives to drivingWhen possible, walk or ride your bike in order to avoid carbon emissions completely. Carpooling and public transportation drastically reduce CO2 emissions by spreading them out over many riders. Drive a low carbon vehicleHigh mileage doesn’t always mean low CO2 emissions.
How do I lower my HC emissions at idle?
On a precomputer carbureted car, one way to get under the HC and CO limits is to retard the ignition timing. This will slow the idle and provide a longer, hotter burn. Then, bring the idle speed back up to specs with the throttle stop screw or idle stop solenoid, which will admit more air.
When would the EGR valve release exhaust back into the system?
When the engine is idling, the EGR valve is closed and there is no EGR flow into the manifold. The EGR valve remains closed until the engine is warm and is operating under load. As the load increases and combustion temperatures start to rise, the EGR valve opens and starts to leak exhaust back into the intake manifold.
What causes a car to have high hydrocarbon emissions?
Below are common failures which are likely to produce high Hydrocarbon HC. Hydrocarbons are basically raw fuel, otherwise known as Gasoline. High Hydrocarbon (HC) emissions are almost always a sign of poor fuel ignition. However, it’s not always that the engine’s ignition system is responsible for high Hydrocarbon emissions.
What kind of fuel is high in hydrocarbons?
Hydrocarbons are basically raw fuel, otherwise known as Gasoline. High Hydrocarbon (HC) emissions are almost always a sign of poor fuel ignition. However, it’s not always that the engine’s ignition system is responsible for high Hydrocarbon emissions. Read on. 1.
What causes high carbon monoxide ( CO ) emissions?
Possible Causes of High Carbon Monoxide (CO) Emissions. High CO means too much fuel. Fuel can only come from three sources: the crankcase vapor control system, the evaporative control system, or the actual fuel delivery system.
Why does my car have a high CO2 level?
High CO occurs when a car is too rich. An O2 level over 1% indicates a lean condition. CO2 is an indicator of over all engine health. If CO2 is not over 13.5 % you have a general engine performance problem. Low compresion, poor ignition, faulty air fuel metering or the like. You’ve probably noticed a pattern here.