Gordon:

I have the Jettronics for Windows software. My intent was to use it for diagnosing problems (haven't had any that weren't my fault ie. forgot to open the manual fuel valve), getting baselines on engine performance (1st run vs. latest runs), and looking at throttle responses (to adjust throttle curves in TX to make it more linear).

The only way to compare history of runs simultaneously is to export it to MS Excel (comma delimited file).

I've got the software to work with WIN 95, WIN 98 and WIN XP.

One slight problem that I discovered is that you have to act as if you are going to save a file then click on "load log" to get a historical run file to load. If you try to click on load log first without "saving the log" the load dialog box does not open.

Another thing to watch for is that you need a PC / laptop that has a serial port with a 16550 UART to be able to keep up with the incoming data stream (any baud rate). If you have an old laptop without the 16550 UART, the data ends up as garbage as soon as the buffer is overrun. The software doesn't include any software or hardware "handshaking" between the PC and the ECU.

These are my experiences only. I think it is a GOOD value when you think of preventative maintenance possibilities (fuel pump voltage, etc. as you pointed out).

Thanks