Need Help Adding MPG Gauge to 1990 Vehicle
I have been reading the forum for a few weeks and would appreciate some advice. I have a 1990 Range Rover that I plan to convert to E85 or E100. First I would like to add instrumentation to get instantaneous MPG and possibly a few other engine measurements (tach, vacuum, volts, etc.) to ensure that the truck is running at its best and to measure performance as the ethanol to gasoline ratio is increased.
The truck has an OBD I port, EFI, an existing road speed sensor, and plenty of room and access to install hardware and wiring. What would be the best avaiable option to get an on board system to provide instantaneous MPG?
Thanks in advance for any help.