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Old Mar 25, 2008 | 08:36 PM
  #11  
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choochoo
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Default RE: closed loop

fuel injection system that uses O2 (oxygen) sensors in the exhaust
that provide a real time feedback signal to the ECM, so the ECM
can constantly adjust the fuel / air ratio and spark timing
for the current operating conditions.
It also looks at the other signals from other sensors simultaneously
while making the appropriate adjustments.

http://auto.howstuffworks.com/fuel-injection1.htm

 
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