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Old 03-11-2008, 08:08 PM   #11 (permalink)
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Protocol

Quote:
Originally Posted by cfg83 View Post
extragoode -



I have one but I haven't got it to work consistently. But, it may just be a function of the car it interfaces to. It was fickle for my Saturn.

Also, all the good Software costs extra $$. The free software doesn't have good downloading capability (that I have found).

It's main virtue to me was that it shows the 02 sensor(s) and short/long term fuel trim, which the SG does not (boooo!). I got discouraged so I put it on my back burner list.

CarloSW2
Do you know which protocol your Saturn uses? The compatibility chart linked to on there site says my nissan uses an ISO 9141-2 or something like that. I'm going to do some more research before I believe them, but wouldn't be suprised if it works somewhat differently with different protocols. Does that make sense?

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Old 03-11-2008, 08:21 PM   #12 (permalink)
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Quote:
Originally Posted by extragoode View Post
Do you know which protocol your Saturn uses? The compatibility chart linked to on there site says my nissan uses an ISO 9141-2 or something like that. I'm going to do some more research before I believe them, but wouldn't be suprised if it works somewhat differently with different protocols. Does that make sense?
It makes a lot of sense. Also, it might be something to do with my PC configuration. I have this one (the one for GM products) :

ElmScan VPW Scan Tool - P/N: 420300
http://www.scantool.net/products/pro...products_id=12
Quote:
The ElmScan VPW Scan Tool comes mounted in a steel enclosure and can be used with our free software to turn your computer into a sophisticated auto diagnostic system. This interface supports the J1850 VPW protocol used mostly in General Motors vehicles.


I suspect that because I am a Saturn, I am a little different from the protocol POV. But, since the ScanGauge "just works", I was expecting the Elmscan to "just work" also, so I was miffed.

If I had the time (doctor, if he has the time), I would dig into it and write my own customized datalogging interface.

CarloSW2
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Old 03-24-2008, 05:25 PM   #13 (permalink)
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Re: Saturn

I'm thinking the freeduino has enough processing power to be a mpg gauge AND fix some of the ailments that saturn hypermilers suffer, i.e. give you cruise control back after a 5th gear swap, and do a better job of managing the idle speed. Maybe it can correct a speedo after putting different sized tires on too

Well, vehicle specific versions of opengauge isn't at the top of the list currently, but the project is now open to donations

http://sourceforge.net/project/proje...roup_id=222201
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Old 03-24-2008, 09:48 PM   #14 (permalink)
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Have you looked into the ScanGauge yet? I'm running a group buy on it on several forums.

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