5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

O2 sensors

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Old 04-12-2007, 07:01 PM
  #1  
luizGT91
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Default O2 sensors

hi guys here is my Q
my h/c/i is finished but i was runing without O2 sensors the idle was sick like a early muscle car, but now that i have them back my idle goes up and down form 800 to 1200 rpm aprox.
so can i run without O2 with out a problem or i´ll have some issues later,
in other hand i´m having trouble makin shifts, i´ve checked my shifter and its propèrly set and my trans wasn´t missing shifts before the spec went in so i guess its my clutch cable... am i right???
thanks for your time...
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Old 04-12-2007, 07:04 PM
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Ninety5five0
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Default RE: O2 sensors

You need your o2's, they are necessary. Your computer may take some time to learn. Its not used to more air/fuel, it'll prolly smooth out after a bit of driving it.
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Old 04-12-2007, 07:55 PM
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luckythirteen13
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Default RE: O2 sensors

ORIGINAL: Ninety5five0

You need your o2's, they are necessary. Your computer may take some time to learn. Its not used to more air/fuel, it'll prolly smooth out after a bit of driving it.
+1
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Old 04-12-2007, 08:21 PM
  #4  
luizGT91
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Default RE: O2 sensors

ok, thanks guys
mmm and my tranny whats wrong with her?? first she didn´t like high rpm shifts now every gear seems hard to put in any chance that my cable is doing it??
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Old 04-12-2007, 08:25 PM
  #5  
LTnone
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Default RE: O2 sensors

Best way to teach your computer- disconnect the neg battery cable for 30min, reconnect it and start her up. Don't touch the gas, let it idle until it reaches operating temps, then shut it off and let it cool all the way down. Done. You're getting a tune, right? Ask about tuning without o2s
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