I cant seem to figure out which wires i should tap into for power ground and o2 sensor. I have an s5 n/a to Tii with n/a harness so im not sure what the heck is goign on. Ideally i should tap the power, ground, and o2 from the wires closest to the ecu right. Can someone be kind enough and try to figure out which pinouts on the ecu plugs are for these three. I cant read these fsm wiring diagrams to well.
Thank you

 

Sure bro. If your using the t2 s5 ECU

2c is o2 sensor
1b is power
3b is ground

First Plug : 3Y-3W-3U-3S-3Q-3O-3M-3K-3I-3G-3E-3C-3A
3Z-3X-3V-3T-3R-3P-3N-3L-3J-3H-3F-3D-3B


Middle Plug: 2O-2M-2K-2I-2G-2E-2C-2A
2P-2N-2L-2J-2H-2F-2D-2B


Last Plug: 1U-1S-1Q-1O-1M-1K-1I-1G-1E-1C-1A
1V-1T-1R- 1P-1N-1L-1J-1H-1F-1D-1B

 

my question is why? not flame but a serious question. it would only be useful to know if your narrowband is working properly, aside from that it is a useless gauge.

 

I got a boost guage, oil pres. guage, and air fuel guage off my friend for $60 so why the heck not? autometer phantom guages. seriously i guess that checking if your narrow band is working is the only use. Looks cool at night. Cant really think of any other reasons.

 

oh almost forgot.. you are the man.

 

well it's a good deal, i still woulda sold the a/f gauge and put it towards a coolant temp gauge.

 

true.... thats next.

 

oh remember, dont cut the wire. Just shave the plastic off it and wrap your wires around the exposed wire. Use small metal clasps or better yet buy urself a solder gun and solder the connections (and of course use elec tape). Its easy to do and you can get a cheap gun at radioshack for 10 bucks. TBH i solder all my wire connections now and they are solid.

 

This should make things a little clearer.



Not being suitable for tuning is completely different from being "useless". It's only useless if you don't understand what it's telling you and how that info can be used.

 

better still.
Thank you very much!

 

Not being suitable for tuning is completely different from being "useless". It's only useless if you don't understand what it's telling you and how that info can be used.[/QUOTE]

agreed the narrowe band simply seems eratic because of the ecu correcting itsself in such cshort time incraments essentialy if you are looking for a rough tune then yeah its fine but bottom line is no tuning will be even remotly usful without a dyno because a car can have 14:1 across the board but actualy that could be causing it toloose power so tuning with either a wide band or a narrow band is usless the gauges are primarly used for monitoring

 

my a/f gauge still doesnt work.

 

What? The A/F guage is very useful in tuning when used with a wideband and other data. You don't NEED a dyno to tune. Tuning isn't all AFR's.

 

well i got mine working.. Thanx again for the help guys. i using it primarily for monitoring right now. Just making sure it doesn't go lean when im on the gas.

 

That only happen in light-load cruising when the ECU goes into closed loop. If the reading is erratic under load then something is wrong. Either the gauge is getting a bad signal (loose connection) or something is actually upsetting the mixtures.

Do you want help with it or was that just a random thought?