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Old 01-20-2014, 09:31 PM
  #161  
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Car runs amazing now!!

Unscrewed the passenger and drive side o2's and swapped them... And it runs great. I mean, amazing.

In closing; the drivers side o2 on the harness side is screwed into the passenger side, and the pass o2 is screwed into the driver side, and the car runs great.

I'm baffled. Completely baffled.

Is the 04 PCM different when it comes to O2 sensors? I've always heard if you cross the o2's then you'll get the same symptoms I had. Fouled one side and white the other...
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Old 01-20-2014, 11:33 PM
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Yep must have been from when you re pinned the harness
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Old 01-21-2014, 07:42 AM
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Makes sense if you had them backwards at the pcm. So what happens is if bank2 is reading lean, it's actually bank1. So it continues to add fuel to bank2 but never gets the response it's seeking, till you go full enrichment with the fuel trims and foul out the plugs, or the opposite. It sees a rich condition, tries to lean it out, continues to do so, and leans it out till it knocks so bad.
One easy way to have checked that would have been to monitor fuel trims and see if the fuel trims were matching what the O2's were reading. Glad to hear it's fixed and running well.
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Old 01-21-2014, 09:49 AM
  #164  
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Apparently that's how the 04's are. The after cat o2 sensors are SUPPOSED to be crossed. So when it was repinned, the same principe applies via the harness itself.
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Old 01-21-2014, 10:21 AM
  #165  
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Glad you got everything figured out David!
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Old 01-21-2014, 12:10 PM
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Originally Posted by Sales1@Texas-speed
Glad you got everything figured out David!
Me too. You have no idea.

This REALLY woke the Corsa up. Thing straight SINGS now as you're rowing gears.
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Old 01-21-2014, 07:37 PM
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Originally Posted by dr_whigham
Me too. You have no idea.

This REALLY woke the Corsa up. Thing straight SINGS now as you're rowing gears.
I don't wanna be the one to say "I told you so".....but....."I told you so"
Glad you figured it out....and now that I think about it I crossed the wires/O2
sensors for no other reason than they just seemed to fit proper that way.
I would have hung myself before trying/fixing that dilemma that you figured
out......GREAT JOB MAN !!!!!!
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Old 01-22-2014, 10:35 AM
  #168  
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Off to Geoff's...
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Old 01-22-2014, 10:57 AM
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Will be watching for results
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Old 01-22-2014, 01:03 PM
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Backing up to the dyno now.

I don't really care what she winds up putting down. All I want is a good bolt-on tune and a solid baseline for the future mods.
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Old 01-22-2014, 01:27 PM
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Good to hear you got it straightened out. How does the car sound? Do the tri-y headers change the typical rasp at 2200-2600rpm?
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Old 01-22-2014, 03:27 PM
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No tune yet... Just a baseline

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Old 01-22-2014, 03:47 PM
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Let's see how good Geoff really is.
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Old 01-22-2014, 03:56 PM
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Nice base!!
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Old 01-22-2014, 03:56 PM
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That run is LEAN AS HELL

Damn those headers make it lean...
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Old 01-22-2014, 04:06 PM
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Originally Posted by dr_whigham
That run is LEAN AS HELL

Damn those headers make it lean...
I bet adding fuel is going to bring the power where it needs to be...

If stock injectors, you might see 90% DC!
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Old 01-22-2014, 04:21 PM
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Should make some really good power for a basically stock engine once the A/F ratio is dialed in!
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Old 01-22-2014, 04:23 PM
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They make it so lean because they are working getting all that exhaust out and sucking in more air. I bet you'll see a nice bump once you get the afr's in check.
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Old 01-22-2014, 05:02 PM
  #179  
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351/368 SAE

373/391 Uncorrected
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Old 01-22-2014, 05:20 PM
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Solid numbers right there
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