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Why no lean code Turbo charger in car?
Fuel ratio is controlled by mass air flow sensor so when turbocharger send more air in engine, why there is no engine check light?
I mean there is too much air getting in cylinder so it should indicate a check engine light,
No?
Normally when there is air leak in engine, there is check engine light showing engine running Lean code something... because engine is getting more air ratio than fuel, so why when turbo or supercharger sending more air in engine there is no light? Thanks
6 réponses
- Anonymeil y a 6 moisRéponse favorite
Turbo chargers have a wastegate to dump excessive air. So you should never get too much air unless the wastegate mechanism is faulty. There are two systems mechanical and that controlled by the ECU.
- Anonymeil y a 6 mois
Because the computer knows it has a turbo and knows what to expect from the sensors as a result.
- The DevilLv 7il y a 6 mois
Mass air flow gives a factor to the computer to enrich the mixture and maintain the correct fuel/air ratio. It's the same as when the throttle opens and closes.
- L.N.Lv 7il y a 6 mois
Because when the turbo kicks in, the air density to the intake increases and the mass airflow sensor detects this and it is compensated for. It literally reports the mass (weight) of the air entering the intake, not the volume.
- ?Lv 7il y a 6 mois
Because the O2 sensors downstream are adjusting for the boost and the ECU is programmed for the fuel changes due to increased downstream O2 signals. It is all part of a balanced system.
- Anonymeil y a 6 mois
because they're not just pushing more air into the cylinder, they're also spraying more fuel. people who add turbochargers to their cars usually have to upgrade the injectors to spray more fuel. cars that come turbocharged from the factory already have upgraded injectors.
