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Discussion Starter #1
My header is glowing red after I swapped in a 2.5 in my 2006 mazda 3 afrs are reading 13.7 when driving. But at idle my afr's are at 14.7 car was originally a 2.0 then I swapped in the 2.3 from my parts car. I've downloaded a basemap to the ecu hence my header is still glowing red after I drive my car what do I need to do to fix?
 

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one pipe or all glowing red
as you seem to understand glowing equals lean
O2 sensors faulty?
 

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Discussion Starter #3
one pipe or all glowing red
as you seem to understand glowing equals lean
O2 sensors faulty?
All glow I changed the o2 sensor, i fixed the vacuum leak i had, I changed the map sensor. Now it's running rich at highway speeds now I dont know what it could be
 
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