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Author Topic: O2 sensor modifier: defective  (Read 7702 times)
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moonrider_99
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Posts: 52


« Reply #15 on: March 06, 2016, 08:29:56 PM »

Thank you for your patience and quick replies, lol.

Unless I'm crazy, the red circle below shows where you had yours.... Here's a different angle. My question is, this line goes to the BPV, could it be that's my Forge BPV is not compatible with this location for the O2 modifier?

RED Circle is where the O2 modifier line was and the car ran terribly.

Green Circle is where I put it now.

Blue Circle is the boost gauge, installed by previous owner. Always been there since purchase. Good Boost signal.

Previous angle


It's really odd. I have nothing connected, the car runs great.
I connect the O2 modifier to red circle, car runs very bad, barely accelerates.
I connect O2 modifier to the green circle, car runs well (maybe a little better? Meaning better mid-range).

I honestly can't tell because I'm a little frustrated at this point. Is there a way to tell if the mod works by O2 voltage? I used my OBD2 Bluetooth reader and got what appears to be normal responses for both.



« Last Edit: March 06, 2016, 08:35:14 PM by moonrider_99 » Logged

2012 Mazdaspeed3
2004 MSM
I'm a Turbo addict, I know.
SilverMiataRacer
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« Reply #16 on: March 06, 2016, 09:46:11 PM »

And where you have it now is wrong.  It's on the wrong side of the check valve and it's wrong.  The spot I showed you, which does go to the BOV and is the correct spot to be.  If it doesn't work there you have a different problem but you have to have a correct boost/vacuum signal first before you can fix it.  If it ran bad with it hooked to that spot then you might have a bad O2 modifier, not likely, or it's installed incorrectly.  No your BOV brand has nothing to do with it.  Fix the signal source first and then trouble shoot what's wrong with your install.  I still am betting the unit is spliced into the wrong wires.
« Last Edit: March 06, 2016, 10:04:47 PM by SilverMiataRacer » Logged

Larry

4 Miatas but who's counting!!   Cool

White Knight    1991 Crystal White   #99 CSP
Silver Bullet     1992 Silverstone     #17 SM2  FM I+ Turbo  (Gone but not forgotten)
Honey B          1992 Sunburst Yellow #99 SM2 J.R. M45
Whooosh         2004 Titanium MazdaSpeed MX5  #403 of 4000
Subie              2006 Steel Gray WRX STi Cobb Stage 2 (Gone but not forgotten)
No name yet    2008 Velocity Yellow Tintcoat Z06 Corvette
No Name yet    2014 Ashen Grey Metallic Camaro 2SS 1LE

“There are only three sports: mountain climbing, bull fighting, and motor racing. All the rest are merely games.”
– Ernest Hemingway
moonrider_99
Second Gear
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Posts: 52


« Reply #17 on: March 06, 2016, 11:49:10 PM »

And where you have it now is wrong.  It's on the wrong side of the check valve and it's wrong.  The spot I showed you, which does go to the BOV and is the correct spot to be.  If it doesn't work there you have a different problem but you have to have a correct boost/vacuum signal first before you can fix it.  If it ran bad with it hooked to that spot then you might have a bad O2 modifier, not likely, or it's installed incorrectly.  No your BOV brand has nothing to do with it.  Fix the signal source first and then trouble shoot what's wrong with your install.  I still am betting the unit is spliced into the wrong wires.


Understood, I will investigate further the BPV line issue. Thank you for your help.

I'm not sure what to say regarding the connections, they are in the right spot, right color... Unless there is no contact inside the connection.
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2012 Mazdaspeed3
2004 MSM
I'm a Turbo addict, I know.
SilverMiataRacer
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« Reply #18 on: March 06, 2016, 11:58:57 PM »

No contact would just cause the unit to do nothing.  You say the unit causes the car to run badly.  That to me indicates you have something hooked up wrong.
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Larry

4 Miatas but who's counting!!   Cool

White Knight    1991 Crystal White   #99 CSP
Silver Bullet     1992 Silverstone     #17 SM2  FM I+ Turbo  (Gone but not forgotten)
Honey B          1992 Sunburst Yellow #99 SM2 J.R. M45
Whooosh         2004 Titanium MazdaSpeed MX5  #403 of 4000
Subie              2006 Steel Gray WRX STi Cobb Stage 2 (Gone but not forgotten)
No name yet    2008 Velocity Yellow Tintcoat Z06 Corvette
No Name yet    2014 Ashen Grey Metallic Camaro 2SS 1LE

“There are only three sports: mountain climbing, bull fighting, and motor racing. All the rest are merely games.”
– Ernest Hemingway
moonrider_99
Second Gear
**
Posts: 52


« Reply #19 on: March 16, 2016, 01:16:05 AM »

Well, this is the best I can do for now. it's working, log below. Boost gauge is unaffected by this plumbing so I'm assuming the O2 modifier is ok as well. Short pull below: V drops to 0.4V under boost. 75% = foot the floor for me.


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2012 Mazdaspeed3
2004 MSM
I'm a Turbo addict, I know.
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