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Nairaland Forum / Nairaland / General / Car Talk / What Is "Car Running Rich" And "Car Running Lean"? (7873 Views)
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What Is "Car Running Rich" And "Car Running Lean"? by Naijauto1: 5:31am On Mar 28, 2018 |
Insufficient or too much fuel will result in your car running rich or running lean. Diesel and gasoline are the main kinds of fuel used to run most today's cars. The proper function of the car requires a right amount of fuel mixed with a proper amount of air burned in the engine. If the ratio significantly changes, it will cause numerous negative effects on your car The perfect air fuel mix of 14.7:1 (1 part fuel to 14.7 parts air) called “stoichiometric fuel ratio." However, most engines cannot reach this gold ratio. Instead, they usually run a little richer, especially when cold, under a load or when accelerating. If the ratio significantly changes, it will cause numerous negative effects on your car. In case there is not enough air and too much fuel, the car “has a rich mixture or “is running rich”. A rotten egg or gassy smell will release from the exhaust resulting in black smoke and a burning effect to your eyes. That also makes the car run hot and causes a clogging up of the catalyst leading to the honeycomb’s degradation. In contrast, if there is not enough fuel and excessive air, the car is "running lean" or "has a lean mixture" will cause jerking. https://www.youtube.com/watch?v=gPWI8QTRg9g Air/Fuel Ratio - How Does Being Rich/Lean Affect Your Engine? Both running lean and running rich will cause poor fuel mileage and engine damage. An amber check engine light will appear alerting drivers to the "system too lean" or "system too rich." Following is the reason why your car gets a rich mixture or lean mixture: Reasons for a rich mixture [center]Bad Engine Coolant Temperature (ECT) Sensor Bad Mass Airflow sensor Retrofitted cooling system (Thermostat removed, double cell radiator, fan running direct) Faulty ECU Bad Mass Airflow sensor Stuck open injectors Bad oxygen sensors Dirty air filter[/center] Reasons for a lean mixture [center]Vacuum leak Bad fuel pressure Pump regulator Stuck open EGR valve Insufficient fuel[/center][/b] Source : https://naijauto.com/car-maintenance/what-is-car-running-rich-and-car-running-lean-361 2 Likes 1 Share |
Re: What Is "Car Running Rich" And "Car Running Lean"? by idrisolaide(m): 7:29am On Mar 28, 2018 |
a |
Re: What Is "Car Running Rich" And "Car Running Lean"? by yungrylex00(m): 7:30am On Mar 28, 2018 |
Noted |
Re: What Is "Car Running Rich" And "Car Running Lean"? by hubtiva: 7:30am On Mar 28, 2018 |
Nice one bro |
Re: What Is "Car Running Rich" And "Car Running Lean"? by pornhub: 7:31am On Mar 28, 2018 |
really an auto educative post. Thanks for sharing. |
Re: What Is "Car Running Rich" And "Car Running Lean"? by inoki247: 7:34am On Mar 28, 2018 |
I no know. Ask Google no ask am e Don dey epp APC lie ask God he will show you the way and answer |
Re: What Is "Car Running Rich" And "Car Running Lean"? by phoenixchap: 7:36am On Mar 28, 2018 |
Informative.. |
Re: What Is "Car Running Rich" And "Car Running Lean"? by DukeNija(m): 7:36am On Mar 28, 2018 |
What is stuck open injector? |
Re: What Is "Car Running Rich" And "Car Running Lean"? by fineboynl(m): 8:43am On Mar 28, 2018 |
thats why when a car is getting old or poorly used. you will have so many problem you cannot trace. its because so many things got missing which ordinarily most Nigeria machinic and car users will think removing them doesn't mean. the white men that put them there are not fools. when you are buying a car and the engine have been roughly tempered with by Nigeria mechanic and some engine component is missing.. run for your life. those things are there for a reason. 1 Like |
Re: What Is "Car Running Rich" And "Car Running Lean"? by cepha4: 9:15am On Mar 28, 2018 |
Please what does premium gas mean? Is the normal petrol we buy every day premium? |
Re: What Is "Car Running Rich" And "Car Running Lean"? by dandollar1: 9:21am On Mar 28, 2018 |
Please, someone should explain to me how to get the radiator fan of my peugeot 206 back to factory settings. I discovered that the fan was directly connected to power, so that once I put on the engine (ON ii position) the fan starts running and stays on permanently. I took it to two electricians over the weekend and was told I should leave it that way, that I can't correct it. I'm thinking they didn't know how to go about it. The engine temperature hardly gets to 70degree, even after 20 mins of city driving. Will be glad to get a step by step procedure, if possible, so I could guide someone to help me. Thank you all. |
Re: What Is "Car Running Rich" And "Car Running Lean"? by OgaKazeem(m): 11:18am On Mar 28, 2018 |
dandollar1: will not advice U do on ur own... pls try get a competent mechanic to help check the engine. 1. b4 returning fan to default settings kindly ensure the state of your thermostat if its still in d engine or not. if its not... pls get a good one make surenU replace the thermostat. 2. if the thermostat has been fixed then return the fan to d normal settings. pls make sure U get a competent mechanic. 1 Like |
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