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adding a O2 sensor
Posted: November 16th, 2007, 5:32 pm
by Joey's mx
Ok so i have to customize a ford focus header to use on my engine(jdm protege motor) and it has 2 O2 sensor bungs... i noticed even on my genie header that the bung is only on 2 of the cylinders so how good of a reading would that be?? Anyways i was wondering what would happen if i wire up another O2 sensor to the origanal plug( actually having 2 sensors)??
Would it give a better reading or make it go all out of wack??
Posted: November 16th, 2007, 9:57 pm
by ModMX3 - (Carmaster2005)
Your ecu would always use the highest voltage of the 2 sensors which would make you run either more rich or more lean then you currently are. Reason is because your ecu is only designed for 1 o2 sensor input (up front). If i where you I would check to see looking at the spark plugs which cylinders seem to be in the best condition and use the o2 that reads those 2 cylinders.
Posted: November 16th, 2007, 10:34 pm
by Joey's mx
well if running 2 isnt going to help i would cap the 2 bungs off and put a new one at the colector so it is reading all cylinders!!
Posted: November 16th, 2007, 10:40 pm
by 95 rs
why not just use the proper header and have the car run properly?
Posted: November 16th, 2007, 11:16 pm
by Joey's mx
because the engine i have they dont make headers for!! And running a o2 at the collector will only help make the car run better!
Posted: November 17th, 2007, 5:13 pm
by Bumpysbro
or if your tuning you could just buy a wideband and stick it in there and not run it off the ecu.