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Old 03-30-2005, 05:37 PM   #1
WhiteKnight
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Exclamation TXS tuner problem

Hi all,

What do you think will cause this ??

While on the boost my afrs suddenly starts to read as >25:1.

Also , i have done the free air calibration.

Is my wb sensor dead ?


4182 +18.0 4.1 100 80 00 W/B +20.6 55.8 +19.0 +0.5 340.00 3.9 11.80
4301 +19.0 4.2 100 80 00 W/B +18.7 58.8 +19.0 +0.5 340.00 4.0 11.81
4334 +20.6 4.2 100 90 02 W/B +16.2 65.2 +14.0 +0.7 340.00 4.0 15.02
4444 +21.7 4.3 100 90 00 W/B +16.3 67.2 +14.0 +0.4 340.00 4.1 >25:1
4535 +22.9 4.3 100 100 00 W/B +17.3 71.0 +14.0 +0.9 340.00 4.1 >25:1
4585 +23.7 4.3 100 100 00 W/B +18.3 71.5 +18.0 +0.7 340.00 4.1 >25:1
4623 +23.9 4.4 100 100 00 W/B +19.4 70.8 +18.0 +0.6 340.00 4.1 >25:1
4721 +24.1 4.3 100 100 00 W/B +19.6 70.8 +18.0 +0.1 340.00 4.1 >25:1
4810 +24.1 4.4 100 100 00 W/B +21.3 76.0 +18.0 -0.1 340.00 4.1 >25:1
4859 +23.7 4.6 100 90 00 W/B +26.6 71.8 +19.0 -1.8 340.00 4.1 >25:1
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Old 03-30-2005, 05:52 PM   #2
dosage0
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lol.. well I hope its dead and not reading that correctly
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Old 03-30-2005, 06:08 PM   #3
2phless
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That's why you need a regular autometer gauge reading the rear stock sensor as a back-up/ error check for the Wideband.

At any rate, I saw this with a bad VW WB sensor in both the LM-1 and the Tuner. Time to take a trip to the VW dealership for a new one.

First check that the calibration is ok, and check to see that the WB sensor hasn't vibrated slightly loose.
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Old 03-31-2005, 07:28 AM   #4
ride5000
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how many miles on the sensor? leaded gas at all?
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Old 03-31-2005, 08:57 AM   #5
AaronWRX
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find a local who will swap sensors with you. then you can isolate your problem.
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Old 03-31-2005, 05:58 PM   #6
hippy
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I'd say fuel cut, course I could be wrong. Make sure the fuel cut defender switch is flipped.

peace
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Old 04-01-2005, 01:06 PM   #7
WhiteKnight
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Unleaded gas and about 5000 miles with them.

and FCD is on.

Last edited by WhiteKnight; 04-06-2005 at 04:47 AM.
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Old 04-02-2005, 08:43 AM   #8
WRX1
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where is the sensor?? The sensor could be to hot.

Russ
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Old 04-02-2005, 06:53 PM   #9
WhiteKnight
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The sensor was very near to the oem o2 sensor place on the downpipe.
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Old 04-02-2005, 08:14 PM   #10
jaxscuby
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sti utec's fuel is set at 22 psi in the states.
and looking at your log..low boost at 21.7
and the rest of the boost was past 22psi..
unless you had already raised the fcd.
but you car was still revving..
check the wb..like the others said
try swapping wb..
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Old 04-06-2005, 04:52 AM   #11
WhiteKnight
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I think there is a problem with gas flow,

because afr works at low boost and when i hit full boost, it goes off after 2 seconds.
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Old 04-06-2005, 08:46 AM   #12
2phless
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Mine did the exact same thing. It was so consistant that it felt like it had to be a mechanical issue of some sort, but it was just the WB sensor. I knew it was in the WB setup though because the autometer AFR gauge reading off the rear, stock O2 sensor was staying all the way rich.

If the car were really going all the way lean like that, at WOT, you'd feel the power loss. The sensor is only $60 at VW. If that doesn't fix it then you'll just have a new spare one, because eventually it will go bad if it hasn't already.
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Old 04-06-2005, 03:17 PM   #13
WhiteKnight
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My sensor was BOSCH,

would you recommend the vw ?

Is there any significant quality difference ?
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Old 04-06-2005, 06:31 PM   #14
hippy
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The bosch and vw are both bosch lsu4 sensors. People say the more expensive one responds quicker, but I haven't really seen a difference since switching to the vw one.

peace
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Old 04-06-2005, 06:42 PM   #15
WhiteKnight
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Thanks alot..

What are the prices of these sensors ? anyone ?
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Old 04-06-2005, 07:09 PM   #16
hippy
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From what I've seen, around $30-150+ depending on the sensor and where ya get it. You can get a vw one here for a little less then $40+shipping(part number 021906262B). Save your old one if you're gonna get the vw sensor though, cause you'll have to use the old connector with it.

peace
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