ws6fitz

Have a 01 TA Ws6 a4, has mild cam full exhaust and converter. Nothing too major. I have had the car dyno tuned. The trouble that im having is the o2 sensor on the driver side, bank 1 sensor 1 is not responding. The passanger side is working just fine and I have the back 2 sensors deleted. I have changed the sensor multiple times, gotten new extensions, and even went back to the shop that i had it tuned at to look at it again. I have latley re-run new 02 wires from the pcm to the sensor and that is not fixing the problem either. Is there some way that the tune is messed up?? Only reason that i ask this is because this sensor that is not working is reading the same mv as the 2 that are deleted approx 447-450. Please help, i just dont know what to do anymore.

98Camarod

iTrader: (43)

Typically if there is trouble, its usually a melted wire. I was going to suggest looking at the wires, but you already replaced them. Not too sure where to go then.

Old Geezer

iTrader: (3)

Swap sensors side to side. Problem go with, or stay? Helps to eliminate items.

98Camarod

iTrader: (43)

He said he's changed the sensor and ran new wires for it. I don't have a clue, but I'm interested to see the answer.

Old Geezer

iTrader: (3)

were the wires changed all the way back to the PCM????

ws6fitz

Yes, wires where changed all the way back. Ran completly new ones, and still doing the same thing. When I check to see if there is continuety in the wires there is. Its just not reading them in the computer for some reason and dont know why.


also to previous post, I did swap the sensors side to side, didnt make a difference. Still no reading on it.

smokin97

He also bought a new PCM from the guy that tuned the car. Did the same thing as with the old PCM. I think somehow the tune is f'd up, cause all the tuner did was copy the tune into the new PCM and not re-tune it and it does the same thing.

98Camarod

iTrader: (43)

If its hp tuners post up a tune.

ws6fitz

He did the tune on EFI live.

98Camarod

iTrader: (43)

Then I can't lend much help I have hp tuners. Maybe you can post the tune on efi live forums to see if they can see anything out of whack.

ws6fitz

Have you ever herd of any problems with cars being tuned by EFI live???
Also is there a way to look at my tune with HP Tuners? To see if its messed up somewhere?

98Camarod

iTrader: (43)

EFI Live is just another tuning software with basically the same capabilities as HP Tuners. If you have the tune file, just post it up on the EFI Live forum and tell them your problem, hopefully they can help you out.

ws6fitz

Ok cool, thanks for your help. I called the guy that tuned my car for me and hes going to email me the tune so that i can post it, so you guys can take a look at it for me.

edcmat-l1

iTrader: (10)

It's not in the tune. The 02 reading 440-450 mv is an open circuit. Where/how are you taking your resistance readings? Are you only checking to the connector, or are you checking past the last connector to the wire ON the 02 sensor?

How did you replace the wire? Did you butt connect a wire in, or replace the actual pin in the ECM connector, as well as the pin in the 02 connector?

It's probably just the female pin in the 02 connector that's spread open. See it all the time.

ws6fitz

Replaced the wire by taking 4 new wires (same gage) and running them from the 02 directly to the pcm. As for as connecting the wires on the 02 i used new pins that i put on, for the pcm i used butt connectors and used a little bit of the old wires with the old connectors, i couldnt get the new pins that i needed do to on a saturday afternoon and no one had them. I just wanted to see if i could get any kind of reading out of it.

As for checking the resistance of the wires i used a multimeter.

Sid447

[QUOTE=edcmat-l1;11249439]It's not in the tune. The 02 reading 440-450 mv is an open circuit. [QUOTE]

That value (440-460mv) is what both of my O2's read when I key on before starting the engine.
Both of mine work fine.

ws6fitz

[QUOTE=Sid447;11265381][QUOTE=edcmat-l1;11249439]It's not in the tune. The 02 reading 440-450 mv is an open circuit. That reading is with the car running, and heated up. Get the same reading after 20 minutes of driving.

Sid447

[QUOTE=ws6fitz;11266959][QUOTE=Sid447;11265381]No response from them then.

I'll have a look at your tune when you post it.

ws6fitz

I have the tune in my email. If you guys can post ur email addresses ill send it to you so you can take a look. Thanks

jay_lt4

iTrader: (4)

not all o2 sensors are made correctly,, i have ran into this 3 times, gm pcm needs the grounds for the o2 sensor to actually be grounded inside the sensor to the case of the sensor so the pcm can use it as a ground,, many of the aftermarket o2 sensors are not grounded from the actual wires to the case of the sensor inside

all 3 times i fixed the issue easy by splicing the heater ground and the sensor low(ground) together

take a factory o2 sensor and check for continuity from the sensor low(ground) to the case of the sensor if you have continuity your ok if not you need to splice the 2 together, make sure you are checking the sensor low and not the heater circuit ground