OBII Scan Tool....

[John Lamb]

Thanks Jason for the comparison survey.
I just received an email from Alex and he said he thought that his scan
tool should be able to collect the data at 10-20Hz.
I think he uses a different method of polling the data than most scan
tools.
JL

Jason Haines wrote:
> 
> The scan rates are not always the fault of the scan tool. You (and the scan
> tools) are also at the mercy of the data bus and the update rates of the
> different sensor outputs from the PCM. Keep in mind that the diagnostic port
> and the data from the diagnostic port was never designed for calibration -
> it is to help service technicians diagnose problems with the stock vehicle.
> When the OE or OE supplier is doing calibration, they have access to high
> speed sensor data from the PCM (or emulator or external sensors and data
> acquisition). 4 Hz is about the best you can expect and even at that rate
> some of the sensors aren't really updating - they are just giving you the
> same data over and over again.
> 
> The AutoTap software works pretty well. I use AutoTap, the GM Tech 2 scanner
> and the Ease scan tool/data logger (for OBD II applications) and when set up
> correctly they all seem to give about the same sampling rate and sensor
> update rate. I have successfully used the AutoTap software on 2000 model
> year LS1 equipped vehicles (Corvette and F-body).
> 
> Just my $0.02.
> 
> Jason
> 
> ----- Original Message -----
> From: <jll at edge.net>
> To: <gmecm at diy-efi.org>
> Sent: Monday, July 23, 2001 9:22 AM
> Subject: OBII Scan Tool....
> 
> > by Alex Pepper.
> >
> > HI All,
> > I am looking at this scan to to improve my data scan rates.
> > I am disapointed in the AutoTap rates (approx 4 Hz.)
> >
> > Questions:
> >
> > 1) has anyone used this on a 2000, LS1, T/A?
> > 2) will the AutoTap cable work?
> > 3) what kind of data rates do you get?
> >
> > TIA
> > JL
> >
> > http://netwinsite.com
> > --------------------------------------------------------------------------
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