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Messing with the FQS for fuel economy?

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Old 09-14-2005, 03:38 AM
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inactiveuser92616
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Default Messing with the FQS for fuel economy?

I am thinking about moving the fuel quality switch to position 2 (and if I get daring, position 6) in interest of fuel economy.

I know the theory behind it, and the pros and cons of running under a lean burn condition.

My question is... has anyone done it? Is the closed loop program just going to override my adjustment?
Old 09-14-2005, 04:39 AM
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Don 944 LA
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It won't change the fuel, just the timing if your running 87 octane
al the (+) & (-) are for euro models that don't consult an O2 sensor.
Old 11-20-2005, 05:29 PM
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L8 APEKS
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Not to revive a dead thread...but according to Wilks page, the later model cars DO adjust both fuel and timing with the FQS.

http://frwilk.com/944dme/fqswitch.htm

I only noticed because I'm fiddling with this today.



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