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Old 01-09-2009, 01:12 PM   #5 (permalink)
wagonman76
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Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 841

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

Winter Wagon - '89 6000 LE Wagon
90 day: 29.05 mpg (US)
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Thanked 4 Times in 4 Posts
Another thought is if the wiring for the VSS runs very close to the door lock relay, the electromagnet in the relay could be sending a pulse down the wire. Or I have seen on a lot of relay sockets, they put a diode across two terminals to stop backfeed when the relay trips. Perhaps if there is not a diode there, it might be causing some issues.
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Winter daily driver, parked for the season, except used occassionally for junkyarding


Summer daily driver
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