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11-25-2006, 06:15 PM | #1 |
Scooby Newbie
Member#: 133211
Join Date: Nov 2006
Chapter/Region:
MAIC
Vehicle:2003 WRX Silver |
Hydra emissions testing
Apologies for being a newbie. I bought a WRX from a guy this summer and he'd had a hydra put in. Now I need to get it emissions tested but to my knowledge the hydra is incompatible with OBDII required in my state.
Is hydra incompatible with the OBDII standard? - If not, how can I set it up so it gives the proper readouts at the emissions testing station? - If so, how can I revert to the stock ECU to pass emissions? I have the stock ECU with a piggy-backed u-tech, as well as the stock O2 sensor, but the harness for the O2 sensor appears to have been modded into a flat 5-pin clip for the hydra's wide-band sensor, replacing the square 4-pin clip needed for the stock narrow-band sensor. Do I need to make a 4-pin to 5-pin connector, or am I missing something? Thanks for the help!
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11-26-2006, 02:06 AM | #2 | |
Scooby Specialist
Member#: 27108
Join Date: Oct 2002
Chapter/Region:
MWSOC
Location: Detroit-ish, MI
Vehicle:2004 STi 2004 A4 |
Quote:
The connector for the factory O2 sensor should still be in place near the passenger shock tower... |
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11-26-2006, 11:11 AM | #3 | |
Scooby Guru
Member#: 32636
Join Date: Feb 2003
Chapter/Region:
MWSOC
Location: Dayton, OH
Vehicle:2004 Impreza STi Silver/Silver |
Quote:
offset |
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11-27-2006, 10:57 AM | #4 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
I made a post somewhere in this forum on what is needed to pass emissions. You can either keep your UTEC and run it just to pass emissions or you can drop in your OEM injectors and run the stock ECU for emissions time. It's important to keep the throttle in closed loop fuel control which is usually 50% TPS or less. Run the car through I believe it's 4 drive cycles to get all the readiness codes set. This will require you to get on the highway and cruise at 50+ mph for over 30 seconds at a time, pull over, turn the car off to reset the ECU and repeat 3 more times. This should have all the readiness codes set but 1 (Evap) which will allow you to pass your OBD2 scan.
Keep in mind to be legal you still need to install your catalytic converters. Thanks, Phil www.elementtuning.com |
11-29-2006, 07:00 PM | #5 |
Scooby Newbie
Member#: 133211
Join Date: Nov 2006
Chapter/Region:
MAIC
Vehicle:2003 WRX Silver |
Thanks
Thanks so much to everyone who's responded. I believe I now have a better understanding of what I need to do. I'll be trying to put my 02 sensor on this weekend to pass emissions next week. Hopefully by late next week I can be back to my wide-band 02 sensor and 4" dp!
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11-29-2006, 07:07 PM | #6 |
Scooby Newbie
Member#: 133211
Join Date: Nov 2006
Chapter/Region:
MAIC
Vehicle:2003 WRX Silver |
Btw
By the way, Phil, the previous owner told me my car was actually tuned by Element Tuning. Very nice job! She runs beautifully with the Hydra in there.
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11-29-2006, 10:41 PM | #7 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
I'm glad you're happy.
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12-03-2006, 06:52 PM | #8 | |
Scooby Newbie
Member#: 133211
Join Date: Nov 2006
Chapter/Region:
MAIC
Vehicle:2003 WRX Silver |
o2 sensor
Quote:
A friend and I got under the car today to try to put in the O2 sensor, but now we're confused. My understanding: 1) The sensor near the front passenger shock tower is a stock sensor and was not touched during installation of the Hydra. 2) The stock rear (narrow-band) O2 sensor was removed, but its harness was left in place (in the middle of the firewall about 10" from the top of the engine compartment), unused. 3) A new wire and clip was run from the Hydra down through the gear shift lever to the first straight exhaust piece behind the rear cat to connect a new wide-band O2 sensor. I thought all I had to do was remove the rear wideband O2 sensor and reconnect the stock O2 sensor, but the sensor I have (which I believe to be stock) is about 12" long and is at least 7" short of the harness I thought it plugged in to, mentioned in #2 above. Can you tell me what was actually changed when the Hydra was installed? The fact that the cable is so much too short makes me wonder if I'm trying to plug it in in the wrong place, but I haven't been able to find a good description of where I /should/ be plugging it in. Thanks, Mike |
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12-04-2006, 06:29 PM | #9 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
You have two oxygen sensors on the WRX. One is located in the exhaust header about 6" from the passenger cylinders. The other sensor is located in the third OEM catalytic converter. If you car is equiped with a non-OEM exhaust system it is common practice to relocate the rear oxygen sensor requiring the OEM wiring clips to be removed to allow enough length to actually install the sensor in the exhaust.
Most with the Hydra remove the rear oxygen sensor from the exhaust and unplug the sensor leaving the harness zip tied to the chassis. They will then utilize that oxygen sensor bung in the exhaust to mount the Hydra WB. |
12-05-2006, 10:25 AM | #10 |
Scooby Specialist
Member#: 27108
Join Date: Oct 2002
Chapter/Region:
MWSOC
Location: Detroit-ish, MI
Vehicle:2004 STi 2004 A4 |
They should also remove the front O2 sensor and replace it with a plug (or use an old dead sensor as a plug), as the Hydra doesn't power the front sensor... and an unpowered O2 sensor in exhaust = a dead sensor.
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12-05-2006, 10:48 AM | #11 |
Scooby Guru
Member#: 8512
Join Date: Jul 2001
Chapter/Region:
South East
Location: St. Pete, FL
Vehicle:2002 WRX chassis... stage-infinity.com |
^^^ Lack of power to the front O2 sensor is news to me. Phil, can you confirm this? If so, why wasn't this mentioned in the Hydra install documents? That'd really suck due to this possible omission. I've got 10,000 miles on mine with the Hydra in place.
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12-05-2006, 12:51 PM | #12 |
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region:
MAIC
Location: Gaithersburg, MD
Vehicle:673 WHP Element Tuning Pro Comp Engine |
I'm sorry but I thought I had made a notation on that in the documentation. I may have just posted and not actually edited the documents. You should remove the front 02 sensor with the Hydra EMS. I had not removed mine for some time but it still works and I just passed my emissions test. I'm guessing this is possible due to how hot the sensor gets being so close to the exhaust valves.
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12-05-2006, 01:03 PM | #13 |
Scooby Guru
Member#: 113734
Join Date: Apr 2006
Chapter/Region:
South East
Location: Charleston SC
Vehicle:2023 FL5 Type R Subaruless |
So were is the BEST place to have your Hydra WB sensor installed???
I wonder if I still have that plug for the headers, hope so . . . |
12-12-2006, 01:25 PM | #14 |
Scooby Specialist
Member#: 94494
Join Date: Aug 2005
Chapter/Region:
NWIC
Location: Seattle
Vehicle:2005 Element 92x Black |
I can't believe somebody sold a WRX with a Hydra still in it.
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