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V3 DIY O2 sims & Question for Beta guys / Shiv
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06-21-2008, 11:09 AM | #1 |
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V3 DIY O2 sims & Question for Beta guys / Shiv
Two Questions:
1) I was just wondering if anyone had received information on the el chepo "Do It Yoursef" 02 sims that Shiv mentioned earlier in the month. It seems quite a few folks have already received their V3 harnesses and I would assume several of them would be putting it on a catless car. Beta Guys & Shiv First off- Sorry I have to post here to ask, but its the only way way I know how to get a hold of the unknown beta folks. Feel free to respond offline via PM Im currently running the V2 sims Shiv sent out to the beta guys a while back. No lights, no codes, but no readiness on the CAT or O2 either. (yeah, yeah Ive been babbling about this for ever) From a software side it was said that "..it turns out that the ECU does a neat little trick to make sure that it's really reading off of a real o2 sensor and a simulation. And unless it passes this verification, readiness will never be achieved. So (Uncle Shiv) revised the PROcede's o2 simm feature to mimick this trick to the T (easy when you are using a microcontroller for all signal processing). And sure enough, the problem is solved." So, that has been resolved as we all know and appreciate. 2) Does the lack of codes or a light mean the physical SIM I have is working properly, or is there a possibility that I need to make a new SIM to solve my issues (relates back to question 1)? THanks ---Yes I am the turd that wont flush--- |
06-21-2008, 11:57 AM | #2 |
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Shiv is no longer using a microcontroller for the 02 sensor simulator, so with the new DIY sims, you're not going to get the readiness tests complete.
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06-21-2008, 01:21 PM | #4 |
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I don't know why you (M3to355) aren't getting readiness with any of the o2 sims you've tried. I have yet to see this be an issue with any other catless car. Even with the DIY option (3 resistors) that I'll be posting up. It does not clamp the upper end of the signal. Instead, it just scales the entire waveform downwards. My car (as well as every other catless car I've checked) has gotten readiness when using it.
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06-21-2008, 01:32 PM | #5 |
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I never tried the BMS.
Up till now Ive just been running the 02 wire pack you sent to the beta guys. Can you help me understand what those are physically doing and how they relate to whatever tweak was done to the new maps? I think if I understood how it was working, I could figure out a solution. Unfortunately Im a mechanical engineer, and am completely electically retarded Still, finding answers is what drives me. This relates to question #2. If what I am running now could be an issue and the three resistor trick is somehow different (you mentioned scaling down).... is there a glimmer of hope that those would work. I will try damn near anything! |
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06-21-2008, 01:36 PM | #6 | |
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Here's why: http://www.epa.gov/oecaerth/resource...aa/casper.html Shiv |
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06-21-2008, 01:36 PM | #7 |
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06-21-2008, 01:43 PM | #9 | |
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Steve, your positivity gives me hope Shiv do you concur that I still have a chance with the homebrew type? As soon as I get the info on making those babies I will jump right on it. Thanks all. |
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06-21-2008, 01:47 PM | #10 | |
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06-21-2008, 01:51 PM | #11 | |
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Also, no need for me to hit up radio shack. I have work to thank for a plethera of electical componets |
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12-01-2008, 08:16 AM | #13 |
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IMO, yes, it could be done independantly and would probably be better. But it was found it is not needed so it reduces the number of voltage dividers (resistor sets) to create. That said, I built my own using two sets of voltage dividers just as you mentioned.
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12-01-2008, 06:11 PM | #14 |
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Correct me if I'm wrong, but the values of the resistors stay the same, we just build 2 of the voltage dividers in Shiv's DIY? Or were the values taking into account the impedance of feeding the single O2 singnal into 2 sensor inputs? I'm guessing low sensor impedance and high input impedance, so it shouldn't make any difference to the resistor values, but hey, measure twice, cut once!
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12-01-2008, 06:40 PM | #15 | |
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