I have started using (and offering) a new product called ScanGauge that has history tracking, does not require a PC, and simply pplugs into the ODBII port - all for $125.00 http://www.scangauge.com/
Reads Trouble Codes
* Reads conditions that set the Trouble Code
* Clears Trouble Codes
* Turns off "Check Engine" light
* Make and store up to 10 rewritable special codes
to send to the vehicle computer
AND
Shows 4 gauges at a time from the possible following:
* Fuel Economy (MPG)
* Fuel Rate (GPH)
* Battery Voltage
* Coolant Temperature
* Intake Air Temperature
* Engine Speed (RPM)
* Vehicle speed (MPH)
* Manifold Pressure
* Engine Load
* Throttle Position
* Ignition Timing
* Open/Closed Loop
AND
Automatically tracks three sets of trip data -
Current (short) Trip
Days (total) Trips
Previous Days Trips
* Maximum Speed
* Average Speed
* Maximum Coolant Temperature
* Maximum RPM
* Driving Time
* Driving Distance
* Fuel Used
* Trip Fuel Economy




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