Can bad O2s cost you 50 hp
11-19-2004, 08:20 AM
#1
Can bad O2s cost you 50 hp I'm pretty sure my O2 sensors are bad, but I'm wondering if that's all that is wrong.
I've lost about 0.4 sec and 4 mph in the quarter, excluding weather, traction and other variables - strictly power, so I figure its probably around 40-50 hp.
Can bad O2s cause this kind of performance loss?
I've lost about 0.4 sec and 4 mph in the quarter, excluding weather, traction and other variables - strictly power, so I figure its probably around 40-50 hp.
Can bad O2s cause this kind of performance loss?
11-19-2004, 08:33 AM
#2
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It's conceivable, if they jacked your fuel trimming
up so far that (say) you went from 12.5:1 all the
way to 11:1 (which a +15 LTFT put onto a good
WOT mixture would do).
A logging session would show this kind of thing or
discount it.
up so far that (say) you went from 12.5:1 all the
way to 11:1 (which a +15 LTFT put onto a good
WOT mixture would do).
A logging session would show this kind of thing or
discount it.
11-19-2004, 10:44 AM
#3
Originally Posted by jimmyblue
It's conceivable, if they jacked your fuel trimming
up so far that (say) you went from 12.5:1 all the
way to 11:1 (which a +15 LTFT put onto a good
WOT mixture would do).
A logging session would show this kind of thing or
discount it.
up so far that (say) you went from 12.5:1 all the
way to 11:1 (which a +15 LTFT put onto a good
WOT mixture would do).
A logging session would show this kind of thing or
discount it.
11-19-2004, 10:47 AM
#4
TECH Senior Member
Originally Posted by EverclearZ
So I should check my LTFT at idle and if they're high > +10, it would indicate that I'm extremely rich under load?
You can also log the FTC and LTFTs ... and I think you just average FTCs 4-19 (not 100% confident it's the right range) ... and after a lil driving see what the average looks like
However keep in mind extreme high LTFTs can also be caused if there's a vacuum leak and unmetered air is entering post MAF ... so it may not be bad O2s (bad O2s should set a code), could be a leak
