MPG gauge
#17
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From the service info by year for 1982:
The electronic circuit of the fuel consumption indicator requires two input signals.
1. The vehicle speed in MPH (km/h)
2. The fuel injection quantity.
The injection quantity is supplied by the injection signal “Ti” from the AFC - control unit.
The signal comes in the form of sine wave impulses with a variable impulse length and indicates the fuel quantity being injected at any given time.
The vehicle speed signal comes from the sending unit for the electric speedometer.
These little booklets include some fascinating reading.
The electronic circuit of the fuel consumption indicator requires two input signals.
1. The vehicle speed in MPH (km/h)
2. The fuel injection quantity.
The injection quantity is supplied by the injection signal “Ti” from the AFC - control unit.
The signal comes in the form of sine wave impulses with a variable impulse length and indicates the fuel quantity being injected at any given time.
The vehicle speed signal comes from the sending unit for the electric speedometer.
These little booklets include some fascinating reading.
#18
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Only for certain years as mandated by the US Feds. Most go to 170. I also have the Fuel Economy guage in my 84 Euro in terms of L/100km.
#19
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Those GPM gauges were a kinda jinky requirement by the CAFE standards in place back then as a way to offset the gas mileage requirements.
In theory, the driver would monitor that gauge to optimize fuel economy.
In real life they really didn't add any value.
In theory, the driver would monitor that gauge to optimize fuel economy.
In real life they really didn't add any value.