[tunerpro] Re: Glitchy Data Aquisition Readings, etc...

  • From: Joseph Davis <pgmfielf@xxxxxxxxx>
  • To: tunerpro@xxxxxxxxxxxxx
  • Date: Mon, 12 Nov 2012 11:47:34 -0500

I'm still on the fence - my gear works great on low mileage stuff but if
it's weathered my results vary.  Boss' brother has another LT1 Caprice that
just exhibits the random glitch,  and I did a '92 454 SS truck on $85 a few
weeks ago that was flawless (the guys on delcohacking where I got the
xdf/adx did an outstanding job on the definition for that one).

You have me wondering if I can band-aid signal problems on the software
side.
On Nov 12, 2012 11:35 AM, "David Allen" <davida1@xxxxxxxxxx> wrote:

> **
> Joseph, I'm 100% sure it's the USB settings.
>
> Multiple cars, multiple comm adapters, even my Caterpillar Marine Power
> engines (at work) use a USB comm adapter, and it is finnicky about these
> settings.
>
> I'm working on a short video now about it.
> David
>
> ----- Original Message -----
> *From:* Joseph Davis <pgmfielf@xxxxxxxxx>
> *To:* tunerpro@xxxxxxxxxxxxx
> *Sent:* Monday, November 12, 2012 10:15 AM
> *Subject:* [tunerpro] Re: Glitchy Data Aquisition Readings, etc...
>
> I may also be speaking in absolute terms and you are onto something,
> David.  All my experiences with the UTEC piggyback system have pointed to
> USB-serial converter mishandling the data stream (trying to make a large
> edit, or write and entire map = fail).
>
> Quite possibly something that can be tweaked in the converter's device
> profile/COM port setting?
> On Nov 12, 2012 11:12 AM, "Joseph Davis" <pgmfielf@xxxxxxxxx> wrote:
>
>> David, you have a wiring or other (ECU) electronic problem.
>>
>> ALDL transmits via an async protocol, the timing of each tick of data is
>> assumed to take place at a certain interval.  Capacitance due to old
>> corroded wiring will slew signals and get them the tiniest bit out of sync.
>>
>> Or, thats the theory anyway.   I've seen the glitch you speak of, and
>> have an LT1 Caprice at the shop now that reads garbage and "glitches" good
>> data - a close inspection of the datastream shows the info is one bit out
>> of sync.  This is also a car I can not flash via ALDL and have to flash on
>> a bench, I intend to make a short ALDL plug off the ECU itself to see if it
>> corrects both logging and in car flashing, and if not I will be dressing up
>> the grounds and powers @ the ECU.
>>
>> Hope this helps!
>> On Nov 12, 2012 10:47 AM, "David Allen" <davida1@xxxxxxxxxx> wrote:
>>
>>> **
>>> Jason - I have fought the same issue you mention. Maybe this will help
>>> those with same issues, as well as possibly help Mark with future
>>> revisions! But I don't think it has anything to do with his software.
>>>
>>> I've had it with several P4-class ECM's (1227730, 1227749, Buick
>>> 3800SFI), as well as several different programs ($A1, $59, other factory
>>> cals). The readings are "glitchy." Normally displaying "good data" and
>>> jumping for an instant to "garbage" data and back to "good." When using the
>>> "Data Dash" it looks like jumpy twitchy needles.
>>>
>>> Before this problem, I had a Dell D610 laptop with a hard-wired DB9
>>> serial port. I was using a home-made MAX232 comm adapter. With this setup,
>>> I got 8 to 9 Hz sample rate, with zero errors.
>>>
>>> Then, I got a new laptop - a Dell E6400. It has NO hardwired serial
>>> ports, only USB. I installed a Radio Shack USB-Serial cable (a GOOD one)
>>> and got the MAX232 comm adapter to work, however the "glitchy data" issue
>>> appeared.
>>>
>>> So, I ordered a Moates Xtreme ALDL comm adapter. (can't remember the
>>> part number) It's got built-in USB-serial chip. It worked, first-try
>>> without any problems (like everything Craig Moates sells); however I still
>>> had the same glitchy data as with the USB-Serial cable and MAX232 adapter.
>>>
>>> Mind you, this was all the same car and ECM. So I thought maybe the ECM
>>> was going out. I got my old laptop back out (has damaged screen and bad
>>> battery) and connected it with the hard-wired MAX232. No glitches,  perfect
>>> data. Updated Tuner Pro to same latest version as my new laptop. Still no
>>> glitches of any sort.
>>>
>>> Next, I installed the USB-serial cable to the old laptop. This had
>>> worked glitch-free with the hard-wired interface. With USB-Serial cable, I
>>> had the glitching data just like the new laptop.
>>> The Moates USB comm adapter also gave the glitchy data on my old laptop.
>>>
>>> *So - it is something within the USB conversion process. * The laptop
>>> won't let me see the settings without the USB cable connected. Later today
>>> I'll take a screen-shot of the working USB settings.  They may have to be
>>> adjusted a little for different laptop I don't know.  After tweaking the
>>> settings, I was able to get glitch-free data aquisition.
>>>
>>> As for the Auto Tune, the guys at Code59.org have something close to
>>> what you describe. Their Auto Tune is an Excel spreadsheet. You copy/paste
>>> the VE tables from TunerPro to the spreadsheet, import the datalog, and it
>>> gives you a new VE table to paste back into the program. It's only for the
>>> fuel, not spark though. I was able to tune a Buick front-wheel-drive
>>> engine starting from the Syclone 4.3 calibration. Other than manually
>>> tuning the idle; the Auto Tune got me 25 MPG and over 400 HP. Can't argue
>>> that!
>>>
>>> Hope this helps! Will have more in the USB settings later.
>>>
>>> Sncerely,
>>> David
>>>
>>> ----- Original Message -----
>>> *From:* Jason H <scorp1us@xxxxxxxxx>
>>> *To:* tunerpro@xxxxxxxxxxxxx
>>> *Sent:* Monday, November 12, 2012 7:36 AM
>>> *Subject:* [tunerpro] Re: Sad Trip To Philippines...............Brian
>>> Shor
>>>
>>> Well for starters it should just be a green button that says "tune", and
>>> everything else should be automatic. :-)
>>>
>>> -SUGGESTIONS-
>>> On a more serious note, I don't know why there isn't an auto tune
>>> feature. While I consider myself a novice, my actions are normally
>>> rudimentary. That when I see consistent knock, I pull the timing, and I add
>>> timing until I see it. It's a similar thing for fuel, shooting for a target
>>> BLM. (125, usually, because I don't have IAT and rarely tune on the hottest
>>> day of the year) It is too difficult to do both at once, so having the
>>> ability to flip between them (or even better: automatically) would be
>>> awesome.
>>>
>>> Another handy feature would be to adjust your fuel tables for a change
>>> in displacement or injector flow rating. But this happens rarely.
>>>
>>>
>>> -ISSUE-
>>> One issue I do have, is that in TunerPro, I get jumpy readings. They
>>> flip between 0 and a real value (witchy needles on the dash while
>>> attempting to use the data connection). I've been through multiple (6) PCMs
>>> (16197427) and 2 Moates APU1s, on 2 different laptops and I can't seem to
>>> fix this problem.
>>>
>>> -ETC-
>>> Ad for the guy who unsubscribed, sometimes the subscription server is
>>> slow and you'll get mail because it's been queued by the time the
>>> unsubscribe comes in.
>>>
>>>   ------------------------------
>>>
>>>

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