Instead of spending the $200 for the software that allows me to read/store information from the computer onto a laptop, could i just hook up voltmeters to the oxygen sensor and the knock sensor and tune the chip from those? What other useful information can reading the computer give you that can help burning proms?

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1991 Z28 305 5spd 1LE, TES headers, dual cats, 3 Chamber flowmaster, Comp cams .488/.495 212/218 the usual street racer with a stock chip.
Gained 20HP by porting and polishing my EGR passage.

 

You can't log data with a voltmeter, nor can you read the data fast enough to know what to do with it. With a scan tool, Diacom, or most of the free programs, you can see all of the data the computer is seeing.

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Greg Westphal
'87 IROC 305TPI/A4

 

Well, if you had a voltmeter with RS232 port (these are actually getting pretty cheap these days) then you could log the data. But, as you said the sampling rate would probably be too slow to be useful. And, you'd only be able to log one sensor per meter.. You'd quickly approach the point where $200 software would be the cheaper alternative.

 

Use a $50 ALDL cable and my free software. It'll log all the data you want to disk, as fast as you want it to. Unless you're really going to use it on a dozen different cars, it's hard for me to understand why anyone would want to spend over $300 to do what they can do for nearly free.

Check previous posts, it works just fine. No charge, open source.

 

Where can I get an ALDL cable for $50?

 

http://www.mindspring.com/~amattei/akmelect.htm

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Bob Wooten
71 Camaro, 91 EFI
r71chevy@earthlink.net
www.r71camaro.homestead.com

 

He wants $95 for his cable. I'd rather pay $50, but you have to spend what you have to spend... After dumping over 15k into my engine, now is no time to start being a tight-a$$!!!