For the FTDI USB chip that Moates (and my Radio Shack USB-Serial Cable) use,
there are 2 settings that can be adjusted to eliminate the glitches.
To access the settings, do the following:
-Plug in the comm adapter to the laptop (or settings will be hidden).
-Control Panel > System > Hardware > Device Manager
-Expand "Ports" and select the USB-Serial Port.
-Open the tab "Port Settings" > Advanced
-Then you will have the screen shown in the attached screen-shot.
The first is the "USB Transfer Size" setting. Setting of 1024 seems to work
best on my system, on both transmit and receive.
The second is "Latency Timer" which seems to work best at 8 ms.
With these settings, I get about 8 Hz sampling rate and 0 errors on Tuner Pro
Data Aquisition. This is with a 1227730 ECM and $A1 program.
Today, my computer seems to be very forgiving and I can't make it glitch. Other
days it's a different story. But the attached settings consistantly work for
all vehicles I have.
Sincerely,
David
----- Original Message -----
From: David Allen
To: tunerpro@xxxxxxxxxxxxx
Sent: Monday, November 12, 2012 10:33 AM
Subject: [tunerpro] Re: Glitchy Data Aquisition Readings, etc...
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
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
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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