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Posted: Mon Dec 05, 2005 2:45 pm
by T3Bunny
lance wrote:The issue here is that this is really an Innovate support issue, and that where people really ought to be asking about how to configure the Innovate products. ...........
When the PWC is released, it will be supported 100% here, as it will be B&G.
Lance.
Points both well taken! I think my post came across wrong or poorly defined though. The MegaManual never goes into any details about setting up actual wideband hardware as it interfaces with the MegaSquirt. Perhaps a small insertion that output grounds need to be grounded at the same point the MS, that d11 can cause errors on widebands with larger voltage windows (and hence more accuracy), and possible issues from outputs with high impedance is something thats in order.
Lots of time and space SHOULDN'T be devoted to this or to a specific brand of wideband other than the PWC. Perhaps the high impedance issue is only an Innovate deal... But if they allow that then I imagine other controllers can also do this. This post here takes up more time and space then the information would need.
Just my humble thoughts. In the meantime those of us that know will try and help out when we see questions like this pop up here. I never thought I HAD an Innovate support issue. I thought I had stuff configured wrong in my MegaTune settings until I saw there was a voltage offset. Then it became a hardware issue, so is it a MS or a Innovate issue? I understand the frustrations in feilding these questions, but for a lot of MegaSquirters, this is their first standalone system and they may never of heard of wideband sensors before this point.
Lance, I had spoken to you about other o2 sensor issues I had before, so you can understand that I felt all along (after scouring my MT settings) that it was something goofed up in my own harness and wiring. I want this to be fun for all of us since we will learn better that way. I was NOT having fun fixing either my regular o2 sensor or the widebans sensor issues....
Wideband 02 (LM1) jumps erratically in megatune
Posted: Tue Feb 21, 2006 11:39 am
by rebel2k4
Ive tried resoldering all connections, reprogramming my LM1, still have this problem.
Basically, I set my car1 directory settings.ini to "Innovate LM-1 0-5V linear" programmed my LM1 and verified its voltage with a voltmeter.
Under EGO settings, I changed the 02 to a wideband, made the switch point 2.47 volts.
In megatune, the air-fuel gauge consistantly jumps about a half an air fuel point. It toggles back and forth somewhere around what my LM1 is saying.
In datalogging, it seems pretty consistant, and it seems more consistant at WOT. Anyone had this problem? Ive tried the 1-2V option as well, still does this.
Its megasquirt'n'spark 024S9, V2.2 MS1
Posted: Tue Feb 21, 2006 11:51 am
by mops
go to lm programmer and set sensor response to 1/8 sec. it will basically average readin over 1/8 second, making it nice and stable.
AND/OR
if you are running ms2, you might be able to do input smoothing in the general menu
AND/OR
you might be getting interference from e.g. injector or coil driver lines.try to temporairly separate o2 input from ms main harness... if you can.
AND/OR
your ego correction might be causing this. make sure you disable it.
Posted: Tue Feb 21, 2006 3:01 pm
by rebel2k4
Thanks for the respose.
Im running MS1. It doesnt seem like interference as it doesnt do this with the NB02.
Also, I did change the response time, didnt do anything. In addition, ego corrections are off, and I checked the output on the LM1 with a voltmeter, there are no rapid fluctuations as it shows in megatune. Its like an oscillation more than interference. Very stable oscillating in the 02 gauge by about .5 afr or more.
Posted: Tue Feb 21, 2006 3:26 pm
by mops
are you sure you calibrated your wb02 in megatune ?
otherwise i'm out of ideas....
Posted: Tue Feb 21, 2006 4:44 pm
by ochizon
mops wrote:are you sure you calibrated your wb02 in megatune ?
otherwise i'm out of ideas....
it is my understanding that you can only calibrate the o2 in MS II
Posted: Tue Feb 21, 2006 4:54 pm
by mops
ochizon wrote:mops wrote:are you sure you calibrated your wb02 in megatune ?
otherwise i'm out of ideas....
it is my understanding that you can only calibrate the o2 in MS II
well, i'm not too familiar with ms'n's, so you might be right...
Posted: Tue Feb 21, 2006 5:28 pm
by benflynn
how is the lm1 programed, the lc1 comes a little weird
Posted: Wed Feb 22, 2006 9:33 pm
by HVviceP
change the impedance on the LM1's advanced options (same page as the response rate) to low impedance
viewtopic.php?t=13738&highlight=lm1+impedance+z
That alone helped mine out a bunch, it still breaks down at the higher voltages (D11 i believe is the culprit) but i just made a calibration curve from 0-3V and all is well.
Posted: Thu Feb 23, 2006 11:03 am
by rebel2k4
That helps out a bunch. So do you suggest for the best results I remove the 5.1v zener diode on the MS board for the 02 sig or just change the LM1 impedence?
Posted: Thu Feb 23, 2006 12:13 pm
by HVviceP
I dont think it is a one or the other proposition. It is my (non EE) belief that the impedance is part of the erratic, jumpy data, and the zener is what chops off the voltages above 3v. In the other post cmacwilly clipped the leg off of the zener and was able to get the full 5v out of the LM1.
viewtopic.php?t=3160 This removes some of the circuit protection and I didnt feel comfortable with doing that so I live with the reduced fidelity of a 2.5v span. Its still an order of magnitude better than the jumpy 1-2v signal i had before.