Fuel/air mixture adjustment on fuel injection - JeepForum.com
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Unread 06-17-2009, 02:49 PM   #1
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1991 YJ Wrangler 
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Fuel/air mixture adjustment on fuel injection

I am familiar with fuel/air mixture on a carb. engine, not fuel injection. How is the fuel/air mixture adjusted in fuel injection engines? 91 4.0 Wrangler

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Unread 06-17-2009, 02:53 PM   #2
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Automatically with input from sensors I believe.
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Unread 06-17-2009, 02:53 PM   #3
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You can't adjust them, everything works based on the input from sensors and factory mapping, you would need a standalone engine management system or a piggyback computer to adjust the fuel mixture or the timing...

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