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Discussion Starter · #1 ·

Take a look at your schemaics for the Fiero again. You don't need the ECM
to run the speedometer.
You do need it to run the cruise control though, but it's not needed to run
the tachometer either.
For the tachometer, provide a 5V pulse for as many pulses as the stock tach
expected to see. ie: 3 per revolution for the V6 or 2 for the 4 cylinder.
(The ICE only fires every other revolution.) The low side of the ignition
from the ECM, a 5 volt pulse, also provides the drive for the tach.

I still have the ECM that I removed from my conversion, but then I have 4
other Fiero's.

>Date: Tue, 21 Aug 2007 15:11:43 -0700 (PDT)
>From: David Brandt <ev_dave>
>Subject: Re: [EVDL] Daily driver vs. hobby: EV reliability issues &
> OEM mass production
>To: Electric Vehicle Discussion List <[email protected]>
>Boy, this really hits the nail of what I have been thinking about the last
few weeks on the head.
>I ask myself 'would I do a fiero again?' =

>...removing the ECU and selling it on ebay, only to find that you need it
to run the speedometer.
>and lest we forget:
>...thinking you are ever actually 'done' with the conversion.

I'll agree that you are never done... kinda like that beer commercial from
years ago that had an old fella working on a huge hand carved door. The
reporter asked him: "How do you know when it's done?"
His reply was: " It's never done.. I just work on it until they take it

'93 Dodge TEVan
'88 Fiero ESE

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