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06-09-2005, 09:34 PM | #1 |
Scooby Newbie
Member#: 35136
Join Date: Apr 2003
Location: MA,CT,GA
Vehicle:2002 WRX WRB |
Tuna going bad?
somewhere above 5k afr spikes up to 19-20 then up to 25ish then all --.-. Usually in a 4th gear pull, not so often in a 3rd or lower pull. IDCs and fuel pressure are fine. MAF voltage is fine. Absolutely no det.
WB02 is orange red so it's not burnt out (yet), but can't accomplish free air cal due to temp unstable (no wind out of exhaust) both through laptop and stand alone. If it's the sensor (which I'm suspecting) man that didn't last long for $200+!!!! INPUTS? Thanks, SMUTTY
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06-09-2005, 10:25 PM | #2 |
Scooby Specialist
Member#: 64293
Join Date: Jun 2004
Chapter/Region:
MAIC
Vehicle:2016 mx5 - do not it a miata! |
I have the same problem with mine. TurboXS told me that it is the sensor. I have not yet bought a new one to confirm that though. If you do get one soon, could you post the part #?
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06-10-2005, 08:36 AM | #3 | |
Scooby Specialist
Member#: 37731
Join Date: Jun 2003
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Quote:
yes, they dont last long. you can get the cheaper vw one for 90 or so i believe. |
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06-10-2005, 09:52 AM | #4 |
Scooby Specialist
Member#: 54597
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:08 'Busa, 08 ML63 10 Multistrada, 996 Targa |
It's the sensor. The VW sensors are available cheap at VW dealerships - like $40 or so I think. But, if you bought the Bosch sensor with your Tuna, the harness will be a little different and you need to replace it with the same type of Bosch sensor. I believe you can get those cheap at some other dealership (Cadillac Catera used it or something?).
You may also be able to buy just the VW sensor harness from TXS and start using the VW sensors. IMO, the slightly more responsive bosch sensor isn't worth the extra cost of replacing them. |
06-10-2005, 10:09 AM | #5 |
Scooby Specialist
Member#: 52043
Join Date: Jan 2004
Chapter/Region:
MAIC
Location: Huntington WV
Vehicle:04 sti |
mine hasn't worked since the day i got it. thats a big waste of money! how can you tell which sensor you have?
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06-10-2005, 10:19 AM | #6 | |
*** Banned ***
Member#: 2992
Join Date: Nov 2000
Chapter/Region:
NESIC
Location: Connecticut, USA
Vehicle:02 WRX Sedan Silver |
Quote:
But, before you buy, you should read this thread: http://forums.nasioc.com/forums/showthread.php?t=589469 The apparently high premature failure rate of these sensors with the Tuna raises the suspicion that the Tuna is driving them incorrectly. The VW part, at least, is designed to last a minimum of 3yrs / 50,000 miles. Last edited by Jon [in CT]; 06-10-2005 at 10:24 AM. |
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06-10-2005, 10:25 AM | #7 |
Scooby Specialist
Member#: 54597
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:08 'Busa, 08 ML63 10 Multistrada, 996 Targa |
The VW sensor has 6 pins, arranged in 2 rows of 3 pins, where one side of the connector is rounded and the other side is flat.
Is there really a high failure rate? How do you drive an O2 sensor incorrectly? It's just supplying a voltage. I'll bet that a lot of folks are putting the sensors too close to the turbo/heads and causing them to run too hot. The sensor must be somewhere that EGTs don't go above 700 degrees so that its heating element can keep it around 700 degrees. |
06-10-2005, 10:49 AM | #8 | |
*** Banned ***
Member#: 2992
Join Date: Nov 2000
Chapter/Region:
NESIC
Location: Connecticut, USA
Vehicle:02 WRX Sedan Silver |
Quote:
Is there really a high failure rate? There seem to be a lot of posts from Tuna users asking about bad sensors. Here are just two examples that describe the exact same failure symptoms as described in this thread: http://forums.nasioc.com/forums/show...73&postcount=9 http://forums.nasioc.com/forums/show...ensor%22+tuner Perhaps a poll, asking whether anyone with a TurboXS Tuner/Tuna/Tuner Pro has ever replaced their Bosch sensor, is in order. Last edited by Jon [in CT]; 06-10-2005 at 10:55 AM. |
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06-10-2005, 11:07 AM | #9 |
Scooby Specialist
Member#: 52043
Join Date: Jan 2004
Chapter/Region:
MAIC
Location: Huntington WV
Vehicle:04 sti |
i would replace mine, but its too friggin expensive. im gonna order the VW harness today.
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06-11-2005, 07:03 AM | #10 |
Vendor
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Join Date: Aug 2003
Chapter/Region:
SWIC
Location: 602-795-3036
Vehicle:Twin 2005 600WHP FormulaD/TimeAttack Sti's |
Like the others said.. Its probably the sensor. You can try to simply clean it. Get a blow torch and gently burn the carbon buildup off the sensor. You have to be very carfull not to overheat it. Just slowly heat the sensor tip in very short bursts. You will see the buildup flash off. about 70% of the time the sensor will work perfectly again for a time period. I have been doing this for years and it works... Like I said.. Be carefull. You can damage the sensor very easy.
On Dynojet WB meters the Sensor is very far from the heat source as the gas is pumped to the sensor. As a result they clog alot. If your Sensor is midway or farther back this could be the problem as well. After cleaning you should get normal readings. If not toss it in the trash. I have two sensors for my LM1. Both still work and I have owned the unit nearly 2 years with almost daily use. Its been in hundreds of cars. The sensors can last a long time. Clark |
06-11-2005, 06:54 PM | #11 |
Scooby Newbie
Member#: 35136
Join Date: Apr 2003
Location: MA,CT,GA
Vehicle:2002 WRX WRB |
Thanks for all the replies. Time for an attempted cleaning then find out what type then convert to VW if it isn't. It's mounted towards the bottom of the downpipe. Not so low that it will get damaged by road crap, but not right behind the turbo either. Software problems also though???? A known problem with a flash update TXS???? I haven't looked at my version or any available updates/fixes.
Man....so close to the drag strip. Just got the Forester STI tranny in (after 3 stockers) and now I can't tune it cause of this. SOON....................soon Again.....Thanks, Smutty |
08-31-2005, 05:31 PM | #12 |
Scooby Specialist
Member#: 43339
Join Date: Sep 2003
Location: mpls, mn
Vehicle:2oo4 STi URgt35r w/t3hM3finj3cki0n |
looks like vw has recalled that sensor.
vw parts has blocked the part from any orders, even if you have a valid gti vin # there is an audi equivilant, or so i've just been told..... |
09-01-2005, 07:42 AM | #13 | |
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Location: lincoln, ri
Vehicle:2003 GGA MBP 12.9 / 105+ |
Quote:
i've got the bosch, no problems with it. 15k miles so far. did you orient your bung correctly? i use the oem rear o2 hole. |
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09-01-2005, 08:10 AM | #14 |
Scooby Specialist
Member#: 52043
Join Date: Jan 2004
Chapter/Region:
MAIC
Location: Huntington WV
Vehicle:04 sti |
i updated my firmware, and it works now.
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09-01-2005, 10:21 AM | #15 | |
Scooby Specialist
Member#: 36528
Join Date: May 2003
Location: florida
Vehicle:2002 Impreza Wrx Silver |
Quote:
peace |
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09-01-2005, 06:03 PM | #16 |
Scooby Specialist
Member#: 43339
Join Date: Sep 2003
Location: mpls, mn
Vehicle:2oo4 STi URgt35r w/t3hM3finj3cki0n |
i'm pulling it tonight, i'll do a free air and see if it helps.
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09-03-2005, 10:00 AM | #17 |
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South East
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Vehicle:2013 BMW 335i Sedan Estoril Blue |
I've got mine mounted in the rear-o2 plug on the downpipe/third cat. It is right before the catback. I dont have any problems with it yet and i've had it in there for quite a while, like almost 2 years i think.
Jeff |
09-06-2005, 01:56 PM | #18 |
Scooby Specialist
Member#: 43339
Join Date: Sep 2003
Location: mpls, mn
Vehicle:2oo4 STi URgt35r w/t3hM3finj3cki0n |
free air calibration results in "Er3"
looking to see who has them in stock right now. |
09-14-2005, 08:17 PM | #19 |
Scooby Newbie
Member#: 30643
Join Date: Dec 2002
Vehicle:2004 PSM WRX STi GT35R - 33PSI - 500WHP |
Mine lasted about 6 months or 5000 miles mounted in the downpipe about 8 inches in front of the cat at the proper angle per the installation instructions. I am thinking about replacing it the a 1999 Cadillac Catera version 0258006065 from AutoZone for $99.99 which is supposedly the same sensor with a longer cable. To convert my Tuna Pro to the VW sensor will run around $250 (including the sensor). In hind sight, I think the LM-1 would be a better purchase than the Tuner Pro with the Bosch. According to it's documentation, it doesn't rely on the calibration resistor. However, the UTEC-to-Tuna integration sure is nice. IMHO, Tuna VW is the best choice for daily driven street cars.
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09-14-2005, 08:29 PM | #20 |
Scooby Guru
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NESIC
Location: Beverly, MA
Vehicle:2005 Big red |
I've been using my Tuner pro for ~1.5 years with the bosch sensor. It is mounted 16" from the turbo outlet. I have had it in 3 different cars for a total of ~35k miles. Sometimes I will get a fre air cal failure, I just recal and it usally goes through fine sometimes it takes more than 1 or 2 tries.
TMS |
09-15-2005, 03:23 PM | #21 | |
Scooby Specialist
Member#: 54597
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:08 'Busa, 08 ML63 10 Multistrada, 996 Targa |
Quote:
http://www.turboxs.com/shop_prod.php?what_category=7 |
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