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Old 12-30-2009, 08:32 PM   #13 (permalink)
So_SiMpLe_
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Join Date: Jun 2009
Location: Lisbon, Portugal
Posts: 26

1.4 TDI - '03 Seat Ibiza
90 day: 49.68 mpg (US)
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Quote:
Originally Posted by rmay635703 View Post
On an older naturally aspirated diesel your throttle position determines fuel flow rate (newer it depends on throttle position and RPM)

Figure a way of knowing exactly where your throttle is and your halfway there.

And yes there was a fuel meter made for measuring the amount of fuel into the engine but likely you would have to find one in an antique shop, perhaps monitoring your injector pulses with an MPGuino would work well enough?

Good Luck
Ryan
That's kinda easy, using a potentiometer on the cable line under the bonnet, but how will it measure the fuel consumption?

My idea with the flow meter is this:

- If you know the amount of fuel that's going to the pump
- If you know the amount of fuel that's returning to the tank

pumpin' fuel - returning fuel= injected fuel

That injected fuel on that precise moment (milisecond, second, hour, minute, whatever) is the one used.

Okay... If you go @ 100km/h and that fuel used is i'd say 5l/h then you have a fuel consumption of 5l/100km

Am I right?


Mate there's a big problem on that, my car is old injection pump, don't have any injection advance, all mechanical, but that wold really work!

What kin of antique shop intrument are you talking about? never seen it, could you help me please?

Thanks a lot mate!
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