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  #11  
Old 04-03-2019, 10:56 AM
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Trim can of course be pos or neg. O2 reading can't be negative.

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  #12  
Old 04-03-2019, 10:20 PM
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Quote:
Originally Posted by andrewwynn View Post
Trim can of course be pos or neg. O2 reading can't be negative.

Is that an actual print out from the OBD II scanner or is that just a typo on the part of the OP while he was preparing this thread.

If you viewed the video that I posted you will see that for the voltage on the 02 sensor (actual screenshot of Torque Pro live data), starts at 0 and goes from there. It can not go into the negative value. It will be the same as if you drove your X in reverse and the speedometer will read a negative value which we all know it doesn't.
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  #13  
Old 04-03-2019, 10:35 PM
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Quote:
Originally Posted by upallnight View Post
Is that an actual print out from the OBD II scanner or is that just a typo on the part of the OP while he was preparing this thread.

If you viewed the video that I posted you will see that for the voltage on the 02 sensor (actual screenshot of Torque Pro live data), starts at 0 and goes from there. It can not go into the negative value. It will be the same as if you drove your X in reverse and the speedometer will read a negative value which we all know it doesn't.
It was showing a negative value.
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  #14  
Old 04-03-2019, 10:53 PM
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I don't even know how that's possible to even display much less have an actual negative value. Cross talk from a near-short. If the number still shows neg on the same sensor I would take the DME out and open and clean the traces. I have a photo with the traces that go to the heater controllers: some gunk on the traces or some gunk in the connector could cause an odd reading like that.
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  #15  
Old 04-03-2019, 11:31 PM
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Originally Posted by Fifty150hs View Post
It was showing a negative value.
What type of scanner are you using?
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2006 Infiniti G35
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Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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  #16  
Old 04-03-2019, 11:36 PM
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What type of scanner are you using?
Schwaben. Same as the Foxwell.
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  #17  
Old 04-07-2019, 11:48 AM
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Update

After previously posting and doing a clearing of adaptations and DME re-calibration I was still getting the same readings off the OBDII. So, I did the adaptation clearing and DME re-calibration again, this time being very careful to exactly follow the procedures directed by the scanner. The SES light has not returned. A scan of the OBDII is now showing what looks more like normal readings that would be expected. I think I may have solved my problem. Knock wood.
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  #18  
Old 04-07-2019, 12:14 PM
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Originally Posted by Fifty150hs View Post
After previously posting and doing a clearing of adaptations and DME re-calibration I was still getting the same readings off the OBDII. So, I did the adaptation clearing and DME re-calibration again, this time being very careful to exactly follow the procedures directed by the scanner. The SES light has not returned. A scan of the OBDII is now showing what looks more like normal readings that would be expected. I think I may have solved my problem. Knock wood.
ME aka Mechanic Error.
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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  #19  
Old 04-07-2019, 12:23 PM
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Originally Posted by upallnight View Post
ME aka Mechanic Error.
Yep
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  #20  
Old 04-07-2019, 02:36 PM
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Quote:
Originally Posted by Fifty150hs View Post
After previously posting and doing a clearing of adaptations and DME re-calibration I was still getting the same readings off the OBDII. So, I did the adaptation clearing and DME re-calibration again, this time being very careful to exactly follow the procedures directed by the scanner. The SES light has not returned. A scan of the OBDII is now showing what looks more like normal readings that would be expected. I think I may have solved my problem. Knock wood.
I had same problem/ish and did the same and it worked for like six months and came back. I'm suspecting i now actually have a vacuum leak or bum MAF. I'll probably finally make/rent/buy a smoke tester and if no smoke, i'll swap MAF back from wife's car to see if there is a change.

I did notice in my case that six mo. ago when i originally did like above and swap MAF with wife, the fuel trims were more like +6, 1% (short/long) and now there are both showing like +5 +7, so the computer is definitely seeing too much air or too little fuel.

what are your fuel trims now showing? if the long term is close to zero i think you're golden. I think i just acquired a new vacuum leak not the same problem returning.
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