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air/fuel guage

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talongod

20+ Year Contributor
274
0
Nov 24, 2002
Mayfield Hts., Ohio
my a/f guage has been hooked up and working for almost a year and now it just stays lit on lean even at wot, can a wire be loose or the guage be broken b.c it seems to drive fine and i also have a check engine light on for fuel trim malfunction?
 
stays like this as in pic
 

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If you have a logger, you can see if you are indeed lean or if it is the gauge, or if you have an EGT gauge, really hot is lean, etc etc. That way you can rule out the engine and narrow it down to a malfuntioning gauge.

--Kyle :talon:
 
how did you hook the gauge up!? It should be hooked to your ecu, all of the wires (3)... if you need a diagram just ask and I will post one :thumb:
 
It's the connection... I would bet it 100%. Those gauges are useless though... I've got one too :thumbdown:
 
94Jettameowpsst said:
Hooked up to the ecu? I have mine running off the sensor wire on the o2 sensor itself. Just wondering is it more accurate if you run it directly from the ecu?
It was alot easier to do it this way... click here for installation for 1g & 2g :thumb:
 
Your sensor could be bad. The logger will not instantly show a bad o2 sensor. It requires a 20-30 minute cruise cycle before the Ecu will throw a Bad o2 sensor code. I'd make sure it's still working with a voltmeter.
 
I recommend a new weight reduction technique, sell your A/F guage to a ricer, those things really serve no purpose. Just use a logger...
 
Eliteracingghmi said:
I recommend a new weight reduction technique, sell your A/F guage to a ricer, those things really serve no purpose. Just use a logger...
haha, i got a friend that always calls me a ricer... I love the light show!!! :thumb:
he was explaining how a wideband is 10x better than a regular a/f gauge, but I got mine in a package for $120 shipped (4 obx indiglo gauges, ebay ;) )... can't beat that!
 
Stanford said:
Your sensor could be bad. The logger will not instantly show a bad o2 sensor. It requires a 20-30 minute cruise cycle before the Ecu will throw a Bad o2 sensor code. I'd make sure it's still working with a voltmeter.

Yes but to rule out the sensor as the problem use the logger to watch the O2 cycle. A good cycle should be .2 - .8 and back. If the gauge is not moving and the O2's are moving then you know it's a connection problem or a gauge problem....the ECU has the final say as to what the O2 sensor is doing right?
 
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