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Air/Fuel Gauge question

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Old Jun 13, 2009 | 02:44 PM
  #1  
WSX123's Avatar
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From: Bridgeville, PA
Car: 1988 Trans Am GTA
Engine: 350
Air/Fuel Gauge question

I have a 88 GTA and installed a Air/Fuel Guage and all it seems to do is jump around from lean to normal to rich to normal to lean is that right is it supposed to do that.
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Old Jun 13, 2009 | 04:52 PM
  #2  
kkingsrulee's Avatar
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From: Temple City, CA
Car: 1990 Camaro RS
Engine: V8 305 TBI
Transmission: W/C T5
Axle/Gears: 3.08
Re: Air/Fuel Gauge question

Well it will fluctuate a little bit, it should not be that drastic.

How does it measure it?
Lambda? if so how much fluctuation between 1.0

If it's off of the stoichiometric 14.7:1 how much fluctuation between that? I'm pretty sure our cars were designed to run lean for emission purposes so it probably would be closer to ~15
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Old Jun 13, 2009 | 06:37 PM
  #3  
fast82z's Avatar
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From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: Air/Fuel Gauge question

If you paid less than $250 for it, then it's working right and telling you almost nothing. A wideband would be ideal to show exactly the AFR rather than lean/norm/rich.
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