Doug Thorley 4.0 Headers - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #26  
Old 01-06-2008
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What the hell does the EGR do anyways?
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  #27  
Old 01-06-2008
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EGR - Exhaust Gas Recirculation - Its for Emissions, it takes exhaust gas and reinserts it into the intake manifold. Anything that didnt get burned gets reburned, thus making it more efficent. Anything thats already burned wont burn again, so it keeps the cylinders cooler, and ensures that exhaust gas is "cleaner" before it goes to the cats. Making them work less to ensure good emission levels.
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  #28  
Old 01-07-2008
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Didn't certain years have the EGR on the left side, then some had the left?
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  #29  
Old 01-11-2008
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will these help with gas mileage?
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  #30  
Old 01-12-2008
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just for the record mine has drivers side EGR. Blah
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