jbc3 Posted August 15, 2005 Share Posted August 15, 2005 As I have been checking off the little details getting my car road worthy, I still had one LT1 ECM computer code bugging me, Code 97, low voltage VSS. Also my Autometer speedo would jump around a little at idle. After futzing around checking all the connections, to no avail, I called Dana at LT1350.com to see if he had any advice. He says that is common and all I need is a 1KOhm 1/4 watt resistor between the +12 and the VSS input at the speedo. All seems to be well now. $1.39 Radio Shack fix BTW, I ran the Speedo from the ECM VSS output signal as opposed to running from the VSS to the Speedo and then to the ECM VSS input. Jody Quote Link to comment Share on other sites More sharing options...
Bartman Posted August 15, 2005 Share Posted August 15, 2005 Thanks for posting this information Jody, I've been having the same problem with my speedo. So you installed a total of two resistors, one on the power and one on the signal? Quote Link to comment Share on other sites More sharing options...
mark Posted August 15, 2005 Share Posted August 15, 2005 Mine is hooked straight to the VSS with out any problems. 93 lt-1. Interesting post, and good info. Quote Link to comment Share on other sites More sharing options...
DavyZ Posted August 15, 2005 Share Posted August 15, 2005 Nothing like a cheap fix to solve an annoying problem! Davy Quote Link to comment Share on other sites More sharing options...
80LS1T Posted August 15, 2005 Share Posted August 15, 2005 When I had the 93' electronics in my car I had it hooked up through the speedo first and then into the computer and never used the VSS output wire. I never had any issues with the Autometer speedo. Now that I have switched over to the 95' system I am using the VSS output. I will have to see how it works out. My car should be up and running again very soon. I will keep this in mind if I have any issues with my Autometer speedo! Guy Quote Link to comment Share on other sites More sharing options...
Tim240z Posted August 15, 2005 Share Posted August 15, 2005 I just spliced into the VSS signal prior to the ECM. Had zero issues. I originally tried the ECm output signal and had problems....called Autometer and they said to tap directly into the VSS before the ECM. Quote Link to comment Share on other sites More sharing options...
jbc3 Posted August 15, 2005 Author Share Posted August 15, 2005 Bartman, don't use 2. You put one resistor between the +12 and the VSS at the speedo. It took all of about 15 minutes including pulling the speedo out. You are actually returning some of the 12V power to the VSS wire to the computer. I actually used the 1KOhm 1 watt resistor since they did not have the 1/4 watt resistor in stock. Jody Quote Link to comment Share on other sites More sharing options...
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