Home |  Forums |  Search |  My Profile |  Chat  Photo Gallery |  Events Calendar |  Technical Documents  No messages |  New Posts |  Watched Topics |  Register   speedo jumps          Forum Index -> ECU and Fuel System Forum Latest ratings Highest-ranked posts Highest-ranked topics Highest-ranked posters   KiwiDazza Fordmods Stock as a Rock Posts: 119 Joined: 04 Jun 2006 Location: Palmerston North Oustide Australia View User Gallery (5) Posted: Thu Mar 13, 2008 12:58 pm    Post subject: speedo jumps I have installed an aftermarket VDO speedo to replace the cable driven one. the background is i have a 96 xr8 and 4 speedo auto in a 67 mustang. I noticed the other day when the car is stationary the speedo needle jumps up to 2o mph! I have the falcon instrument cluster with speedo hidden behind the dash. I can't connect the speedo to the wiring after the instrument cluster as it is changed to a signal the speedo does not recognise. Could the speedo being connected interfere with the vss signal? Also how does the TCM get what gear the car is in ie 1-2-3-D? via the DOL on pin 43? I have the correct voltages at pin 58 for each respective gear position. any ideas? Back to top ghiaED Fordmods Newbie Age:30 Posts: 2 Joined: 01 Mar 2008 Location: Perth WA, Australia View User Gallery (0) Posted: Mon Jul 07, 2008 12:42 am    Post subject: Hey - I have the same problem with a bloody VDO signal convertor where my speedo needle jumps all over the place when my car is stationary. Have spoken to some people who specialize in instrument displays and speedo calibrations etc and the general concensus I get is that the VDO signal convertor is no good. I have a new signal convertor 'box' (which I have yet to install) which I've been assured will correct the problem. Basically, throw the VDO signal convertor away. If you live in Perth, I can pass the details of the company I have purchased my signal convertor box from. Hope this helps. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First             Forum Index -> ECU and Fuel System Forum Page 1 of 1   (c)2002-2008 Matti Jones and Brad Evans [29 queries :: 0.02344 seconds ]