AZMotorgod
Member
- Joined
- Jul 20, 2010
Okay,
Eric help!
My '87 GN passed emissions a couple years ago when I had a 6.1 chip on E85 and 80lb injectors (rest of mods in sig). Cat is on as well as the EGR (I'm assuming as I don't remember it being taken off).
I went to the SD2 and have not been able to pass.
1st time I had all of the parameters to open loop and whatever the default parameters were (98 or 99) with the following results:
(Photo 1)
HC- 1.30 Pass
CO- 20.20 Fail (need to be under 15.00)
NOX- 1.61 Pass
The following mods were made because according to the testing place if you have only a CO failure it is due to overfueling. This last time around I went to closed loop and set Param #2 (Idle), Param #3 (Cruise), Param #5-7 (Low-Mid-Mid/High) all set to a target A/F of 14.0 using a PLX WB, which I am assuming is on the gas scale as I have not changed it. The following results were obtained: (See Photo 2)
(Photo 2)
HC- 0.88 Pass
CO- 22.91 Fail (Need to be under 15.00)
NOX- 0.91 Pass
As you can see I brought the HC and NOX down quite a bit (not that it was needed) but the CO actually went up.
How can I get my CO under 15?
Eric help!
My '87 GN passed emissions a couple years ago when I had a 6.1 chip on E85 and 80lb injectors (rest of mods in sig). Cat is on as well as the EGR (I'm assuming as I don't remember it being taken off).
I went to the SD2 and have not been able to pass.
1st time I had all of the parameters to open loop and whatever the default parameters were (98 or 99) with the following results:
(Photo 1)
HC- 1.30 Pass
CO- 20.20 Fail (need to be under 15.00)
NOX- 1.61 Pass
The following mods were made because according to the testing place if you have only a CO failure it is due to overfueling. This last time around I went to closed loop and set Param #2 (Idle), Param #3 (Cruise), Param #5-7 (Low-Mid-Mid/High) all set to a target A/F of 14.0 using a PLX WB, which I am assuming is on the gas scale as I have not changed it. The following results were obtained: (See Photo 2)
(Photo 2)
HC- 0.88 Pass
CO- 22.91 Fail (Need to be under 15.00)
NOX- 0.91 Pass
As you can see I brought the HC and NOX down quite a bit (not that it was needed) but the CO actually went up.
How can I get my CO under 15?
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