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Old 11-06-2008, 12:30 PM   #7 (permalink)
Master EcoModder
wagonman76's Avatar
Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Originally Posted by moorecomp View Post

I disassembled my dash tonight and rewired the duino to use the signal VSS at the speedometer. Works like a champ! I did retouch all the solder joints and I have my duino hardwired instead of using the phone cord. (I used CAT5 stranded patch cord). I mounted the switches to a small perf board and put them in the dash in front of the steering wheel and they look great. Can hardly see them and they look like they have always been there. I also modified my lcd by removing the polarizing film and rotating it to give the light numbers and dark background. Very easy on the eyes at night. I use the brightness setting 1 and I may end up changing the settings for the 3 preset levels since it is so bright. I don't have it in an enclosure yet, but I will post pics when I am done. On the first try out, I did have the vss set to 8000, but the speed was double what I was actually travelling, so I am using 16000 now. Seems to be very close. Great work and many thanks to all who contribute to this project.

Cool, glad to see that you got it working. I pick up my VSS pulses at the wiring going to the speedometer as well. My cars use a VSS buffer (sometimes its part of the ECM, sometimes its not) to clean up the wildly swinging VSS signal and turn it into discrete pulses. And I would think that if vehicles of this vintage did this, most anything newer would as well. My speed reading is very solid.

Id like to see your work sometime when it is all done. Maybe we could meet up again sometime.

Winter daily driver, parked most days right now

Summer daily driver
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