preventing codes 41 and 91 on forced open loop with Tweecer - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 2 Old 09-26-2013, 07:55 PM Thread Starter
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preventing codes 41 and 91 on forced open loop with Tweecer

Hi everyone, I finally learned how to clear the codes on my 1991 347 with Tweecer fitted and the only ones to come back on after a 10 min. drive are 41 and 91 which are : 41, System Indicates Lean-passenger side(Running code), No o2 Sensor Switching Detected, always lean-passenger side(Continuous memory code) and 91 is the same for drivers side.
Tweecer shows, under scalars: Value Units
hego hi/lo transition test enable switch 1 switch
hego minimum switches before warm 1 integer
hego switching test minimum count to pass 8 none
hego 1 threshold for fault 200 none
hego 1 up counter for fault level 100 -
hego 2 threshold for fault 200 none
hego 2 upcounter for fault level 100 -

Bearing in mind the o2 sensors have been removed ( forced open loop ), should any of this be changed to stop the CEL coming on?
Regards,
Peter

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post #2 of 2 Old 09-30-2013, 12:07 PM Thread Starter
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Thanks for looking everyone. Problem now solved thanks to Willie Lynch at DirtyDirtyRacing.

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