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Hello Oldbeaver,
Thanks for the compliments.
My car runs on gas, I don't know how to connect a MPGuino to a diesel car.
About the VSS signals, I suppose they are pulses of 12V and the AVR microprocessor counts how many pulses, each pulse corresponding to a certain distance travelled.
If the motor doesn't have injectors from where to obtain the fuel flow data, instead it has two different fuel flow sensors which requires an arithmetic operation, then I guess MPGuino would need another input and a new software.
I'm a newcomer to microprocessors and I'm not able to help you with program modifications, sorry!
Gud luck,
demarco
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