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Black_Hat Black_Hat is offline
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Join Date: Aug 2007
Location: Austin
Posts: 466
unplug o2 - disconnect air injection
set afr to 13.5 at idle ...this will increase mixture (AFR)all the way up RPM -EXCEPT when o2 is
connected ...
o2 (frequency valve) will always pull back afr to 14.7 when not under boost

when afr is set to 13.5 @ idle plug o2 back in and check AFR in 3rd -4th and 5th gear under boost at higher RPM
when setting your afr to 13.5 engine needs to be @ operating temp and blip the throttle
several time during the process till it is stable.

if you reconnect air pump afrś will be off again (leave disconnected so you can monitor)

I have a1991 C2 turbo I set my afr like this , leave o2 plugged in and air pump disconnected.
Old 04-04-2013, 05:23 AM
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