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Old 07-23-2009, 12:11 PM   #8 (permalink)
EcoModding Lurker
Join Date: Jul 2009
Location: Eureka, CA
Posts: 16

Daisy - '90 Toyota Corolla DX
90 day: 43.82 mpg (US)
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Initial findings:

With the engine ON my 12V+ connection reads ~14.57V+ and the INJ signal is about the same. The VSS signal is reading in the millivolt range which I find kind of strange. Also, the MPGuino displays 0MPH. The only signal it registers is the INJ signal, and then the whole thing crashes.

I'm wondering if it could be a ground issue? Maybe it doesn't get along well with the tach? (The two have a common ground.) I might try running a new ground wire directly to the battery and see if that helps...

Also, I looked at the unit itself for possible signs of damage or bridged connections and couldn't find anything.

I made the floppy and RJ11 connectors myself using the supplied materials but just in case I'm going to pull a floppy connector off an old power supply and try that. *Sigh* :-)
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