Quote:
Originally Posted by Chas H
I've got a Scangauge that will read out most of the inputs to the ECM. I used it to identify a a bad cat by comparing the the voltage output of the front O2 sensor to the voltage of the rear O2 sensor. Other inputs that can be read are inlet air temperature, alternator voltage, engine rpm and many others. With a little programing real time mpg can be displayed. Benz switched formats at some time so the appropriate reader should be used.
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I have this one. Just make sure your car is supported. Generally you don't have to do any programming to see MPG, that is a standard guage. But you have to type in some stuff to calculate HP and read the O2 sensors I think.
If my CEL comes on I can check the code right away. I was driving and my alt light came on, I switched one of my gauges to voltage and could see exactly what was happening. Very nice. I can also monitor the condition of my MAF by checking the long term fuel trim.
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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