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Discussion Starter · #1 ·
Hi All,

Im the proud new owner of an arrow thunder but now i have a link pipe without a lambda sensor. I read a few posts saying the lambda isnt necessary with a microtec or FBF race ecu. Can anyone confirm this? Thanks!
 

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Old Wing Nut
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The Lambda sensor is not utilized by the FBF/MV CorseECU or the Microtec.
It is part of the emissions system and is only utilized at lower rpms and throttle openings.
The bung could be used for a wide band sensor and auto tune with the Microtec if you invested the money.
 

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Discussion Starter · #3 ·
So if i removed the lambda sensor i could potentially screw up the idle/low rpm response?
 

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Old Wing Nut
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So if i removed the lambda sensor i could potentially screw up the idle/low rpm response?
Not if you have the "Kit" or Microtec ECU that don't use it.
Stock ECU will throw code and idle/off idle will be compromised.
 

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@esq'z me So removal or omission is no problem if FBF/MV CorseECU (race ECU) or the Microtec is installed. --just the be clear for all.
 
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Old Wing Nut
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Yes ..... It is not used by those, only the stock ECU.
 

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Okay, great. Now for the next bit... I imagine a special lambda socket would aid in removal. The heat cycles certainly freeze the unit in place. I tried to remove mine with a wrench. That didn't happen. Size research next...
 

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Old Wing Nut
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O2 sensors should always have anti seize applied to threads.
 

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Yea yea yea FBF didn't always do things the way I would have liked ie high temp anti-seize on the threads. I've been correcting all those little time-saving shortcuts as I go along. I asked back then if the sensor was needed since adding the Race ECU... Over the years since handling my own maintenance let's just say I've been rather surprised as to what I've found.
 
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Old Wing Nut
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FBF was, in fact, just another dealer.
 
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And ALSO removed thanks to @Peteroo who pushed to get it done.
 
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