3800 series II swap, please read :)

[TK]

>From that I can tell, the speedo VSS output is just buffered VSS signal. I
can move the divisor and road speed constant all over hell and the ECM
changes but not the VSS output to the speedo.

Terry Kelley
-----Original Message-----
From: Ludis Langens <ludis at cruzers.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Saturday, July 10, 1999 4:03 AM
Subject: Re: 3800 series II swap, please read :)


>> Kevin wrote:
>>
>> The problems the car is having is VSS,
>> and idle. the VSS the ecm see's is much more than it should be. The
>> 440 has a 14tooth generator, and the 4t60e has a 31 I believe. The ecm
>> see's approx double (not sure cause I don't know my actual speed) and
>> the speedo was way off, so I changed to the 2k output of the ecm, and
>> it is still off by about 20% or so. hoping for any input on this?
>
>How are the VSS, speedo, and ECM wired up?  How were they in the 88
>configuration?  And how were they supposed to be for the 92 computer?
>
>If the hookup is VSS -> ECM -> speedo, and the raw VSS is much higher
>than 4000 ppm, then it may be possible to reprogram a divisor which will
>affect the speedo.  Does your ECM have a chip with a part number of
>45154 or 16045154?
>
>--
>Ludis Langens                               ludis (at) cruzers (dot) com
>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
>
>