Low o2 voltage at idle and high knock at WOT

[talon1987]

First off the car is a 92 tsi awd. Mods are -Small 16g
-Frontmount with short route piping
-550cc injectors
-2g mas hacked
-190 fuel pump
-Safc

Now the porblem at idle the o2 voltage will cycle from .00 or .01 volts. Fuel trims are
Lo-139 Mid-139 and Hi-102 and o2 trim constant 167. While cursing the o2 volts will not cycle either but when the car decels the o2 goes to .90 volts and drops back to .01 but at WOT the o2 stays at a constant .85 volts but its gettin tones of knock as much as 43 counts. The o2 has been replaced with a brand new one and i have searched but no real answer. Any insight to whats the problem or what to check will be great thanks.

-Fitz

 

[GVR4592]

The O2 sensor is probably dead or dying. The knock is probably from a bad tune. We need more details to give you any help in the tuning department. Boost level, Safc settings, base timing, etc.

Do you have the honeycombs to put back into the maf sensor? Hacking the 2g mas is kind of pointless and it makes the car run like ass.

 

[talon1987]

Ok. it's stock boost about 15psi, I'll get the safc setting posted asap, but they are pretty much rre basic settings. I went to check timing and couldn't find the timing connector you need to ground I know its supposed to be by the battery area, I got the car and all vac lines were removed, egr and abs as well idling very poorly. Heres a log of a 3rd gear pull. I'm not going to drive hard untill I can get it better tuned. I also have the honeycombs to put back in the maf. Thanks for helping out and for your advice on this its greatly appreciated. Thanks


TIMA FTRL FTRM FTRH FTO2
33° 139.6% 139.6% 113.1% 166.9%
22° 139.6% 139.6% 113.1% 99.8%
22° 139.6% 139.6% 113.1% 99.8%
22° 139.6% 139.6% 113.1% 99.8%
19° 139.6% 139.6% 113.1% 99.8%
14° 139.6% 139.6% 113.1% 99.8%
11° 139.6% 139.6% 113.1% 99.8%
8° 139.6% 139.6% 113.1% 99.8%
8° 139.6% 139.6% 113.1% 99.8%
9° 139.6% 139.6% 113.1% 99.8%
10° 139.6% 139.6% 113.1% 99.8%
12° 139.6% 139.6% 113.1% 99.8%
12° 139.6% 139.6% 113.1% 99.8%
14° 139.6% 139.6% 113.1% 99.8%
14° 139.6% 139.6% 113.1% 99.8%
14° 139.6% 139.6% 113.1% 99.8%
14° 139.6% 139.6% 113.1% 99.8%
12° 139.6% 139.6% 113.1% 99.8%
13° 139.6% 139.6% 113.1% 99.8%
11° 139.6% 139.6% 113.1% 99.8%
11° 139.6% 139.6% 113.1% 99.8%
12° 139.6% 139.6% 113.1% 99.8%

RPM O2-R KNCK INJP TPS
3344 0.04V 5 8.70ms 74.9%
3813 0.78V 12 8.96ms 100.0%
3969 0.20V 11 9.98ms 100.0%
4094 0.80V 17 11.01ms 100.0%
4375 0.84V 24 13.31ms 100.0%
4219 0.86V 29 15.36ms 100.0%
4719 0.86V 29 17.66ms 100.0%
4781 0.84V 28 18.94ms 100.0%
4969 0.82V 27 19.71ms 100.0%
5219 0.82V 27 19.71ms 100.0%
5281 0.82V 26 19.71ms 100.0%
5563 0.82V 26 19.46ms 100.0%
5688 0.82V 25 18.94ms 100.0%
5906 0.80V 26 18.69ms 100.0%
6031 0.80V 25 18.43ms 100.0%
6188 0.80V 25 18.18ms 100.0%
6156 0.80V 25 17.92ms 100.0%
6250 0.80V 24 17.66ms 100.0%
6563 0.80V 25 17.41ms 100.0%
6469 0.78V 24 17.15ms 100.0%
6781 0.78V 24 16.90ms 100.0%
6844 0.78V 23 16.64ms 100.0%

 

[talon1987]

here are the safc settings.

Hi throttle- Lo throttle- Th point-
1000, 0% 1000, +19% Lo 30% Hi 80%
1500, +1% 1500, +15%
2000, +3% 2000, +10% sensor typer - karman
2500, +4% 2500, +8%
3000, +5% 3000, +5% car select 2 cyl. arrow pointing up
3500, +6% 3500, +5%
4000, +7% 4000, +5%
4500, +7% 4500, +5%
5000, +10% 5000, +5%
5500, +10% 5500, +5%
6000, +11% 6000, +5%
6500, +11% 6500, +5%
7000, +11% 7000, +5%

Any insight on the settings? Thanks for any help!

 

[1LE]

If your BISS is way out of whack, to the point of the ISC being at the end of it's range, you may see really absurd O2 voltages at idle. I don't understand WHY, but I know it happens (I've had that problem before!)...