Re: Miles per gallon meter
From: PEUGPETE@AOL.COM
Date: Fri 26 Mar 2004 - 17:54:56 EST
In a message dated 3/26/2004 3:38:26 PM Eastern Standard Time,
cmpoulin@hopper.unh.edu writes:
My 1986 Jetta has a digital mpg meter for both instant/average mpg, and
it's accurate. The thing is, it's based on only 2 factors: engine vacuum and
vehicle speed, both of which are fed to an ecu which must have pretty good map
of data in it. I have all the components from a parts car, but I don't
think it could work in another type of car because the data in the ecu brain must
be specific to the Jetta.
Cliff
Cliff
Not knowing the Jetta, is it 4 cyl? Is the speed pickup simular to
Peugeot (in the cable)? One thing is constant, 14.6 atmospheric pressure at sea
level. If the P/U is simular, then splice into the cruise P/U wires and "T" at the
manifold. Duct tape to something out of the way. Then take a MPG with pen and
paper for lets say 300 miles. Then check the reading to see how close. Good
project, let us know what happens <;-))
PP
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