ok my tach on my 05 tc seems to not want to work. all my other gauges work and all the illuminations work on my cluster. the kicker is that the tach will work about once every 20 starts for my car. i have seached the forums and couldnt find any ideas on fixing it i found one old thread but the only idea was to buy a new one but money is kinda tight so was wondering if any ideas on what could possibly a fix to this issue