O2 Wideband Sensors advice

Discussion in 'Mech Tech' started by Cov1987, Apr 24, 2017.

  1. Does anyone have any experience with these? Seem to be a lot based in the USA and several different suppliers and specs.

    I had to swap the AFM on my 2l stock l-jetronic last week and the performance of the bus has tanked since- it was a spare of dubious setup and parentage.

    Hence I am looking at getting a 02 wideband sensor to report/log air/fuel ratio to do some informed tinkering. I already have what I think is a bung of some sort in the exhaust, not sure if its egr or o2 related.

    After sorting my AFM issues i will probably use it to create a closed loop fuel injection system on something that currently has dastardly carbs on it!
     
  2. Cov1987 likes this.
  3. One thing I never realised is you have to calibrate your Lamda sensor ....
     
  4. Yes this was one of the ones I was looking at and an earlier LC1 that has easier calibration. They are not cheap though so trying to get an understanding of drawbacks/best features.
     
  5. Cov1987 likes this.
  6. Thanks I will take at look at those. The price certainly looks a lot better.
     
  7. The expensive part is the sensor, don't buy one from eBay S there a lot of fakes
     
  8. mikedjames

    mikedjames Supporter

    I used PLX because they did not need calibration, a few years back when when the Innovate LM-1 which was the opposition seemed to need a clunky calibration.
     
    Cov1987 likes this.
  9. matty

    matty Supporter

    what sort off readings are you going for
    I gave up with the one i was given as it got to confusing i know 14.7 is good for modern stuff but there was lots of conflicting information on old air cooled engines
     
    Cov1987 likes this.
  10. I just calibrated the Bosch sensor once in clean air and that's it . Pretty easy and straight forward .. I think you pays yer money and take yer choice ,, Mario @ the dub shop recommended the innovate set up
     
    Cov1987 likes this.
  11. Yes i need to know which side of 14.7 I am on. Given the loss of power with the AFM switch I think I am running lean which is very bad news for these engines.

    I have bosch l jetronic from the factory and 14.7 is still the optimum for petrol, there are other variations for other fuels which is why lambda is talked about, because each fuel type has a different ratio.
     
  12. I knew i had heard of plx before on here and it was in your setup. Was hoping to have a gander at t/e but got sidetracked too many times.
     
  13. So far the Innovate 3844 looks like it has the features that I need in the short-term and longer term with some very good digital interfaces that I can do some CANBUS type interfacing to. From my research the wideband sensors look a bit temporamental and most of the kits seem to use the Bosch one.

    More research required so that I can take the plunge next week. Fun.:)
     
  14. mikedjames

    mikedjames Supporter

    The Innovate 3844 setup would have been on my shortlist when I bought the PLX, but at the time the LM1 was a bit clunky compared with the PLX.

    The PLX kit uses the Bosch sensor and has a 'narrowband' output to feed an ancient ECU that flips voltage around 14.7, an analog 0-5v output you can use with a meter in the engine bay and a serial digital output that can be daisychained with other sensors. And once upon a time they published their protocol... But the Innovate now looks like it has more tweaks.

    I am now considering using a CAN bus partly because of the amount of damage I did when I shorted 12 volts to the power and data cable of the PLX display. At least CAN bus is meant to be proof against indefinite connection to a car battery.
     
  15. I was looking at CAN as it looks interesting and I wanted to kick the tyres on it :rolleyes:
     
  16. mikedjames

    mikedjames Supporter

    I have also just played with ChibiOS and its CAN drivers at work controlling things on a boat.
    It seems/is pretty easy to set up a basic network based on the CAN bus controller hardware in STM32F series controllers and the drivers in ChibiOS.
     
  17. Hadnt heard of that. Somebody recommended SaviCan to me which I believe is open source but havent checked it out yet.
     

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