03-12-2009, 05:07 PM
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#2 (permalink)
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Base Member
Join Date: Feb 2009
Location: Austin, TX
Posts: 18
Drives: '04 Pontiac GTO
Rep Power: 18
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Quote:
Originally Posted by Black kNight
I wanted to ask
why most cars A/F ration from factory comes rich ???
and can someone help with more Info about A/F ratio so I can understand
Thanks
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Most modern cars are set to run rich (at full throttle) because it's safer for the engine and in some cases, safer for the pollution controls. With a rich mixture there is less risk of damaging engine knock, and it helps keep the cat converter temperatures under control.
During normal driving, the car should not be rich or lean, it will fine-tune itself to just about the right mixture (if everything is working right). So it should only be rich under hard acceleration.
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