Guest Fasterski Posted July 17, 2009 Share Posted July 17, 2009 Hi all, Just wondering if anyone would have any input on the tach not working on the VFR. Eventying seems to be ok just the tach needle stays put. Anything I can think of is about me changing spark plugs recently. Is there anything obvious I could have unplugged doing that? TIA Dom Link to comment Share on other sites More sharing options...
The Phantom Posted July 18, 2009 Share Posted July 18, 2009 Hi Dom, It's unlikely that you caused any problems with connectors but it's worth giving those that go into the motor a once-over. Problems with speedo and/or tacho are often indicative of a failing regulator/rectifier (don't ask me why!). Do some diagnostics on your charging system with a multimeter - from the battery terminals, you should see around 12.8v at rest (off), 13.8v at idle and 14.5v at a steady 5k rpm. Significant deviations from this call for further investigation of both the battery and reg/rec (a problem with one can cause or hide a problem with the other). Link to comment Share on other sites More sharing options...
bluegen1e Posted July 30, 2012 Share Posted July 30, 2012 I'm having the same issue with my 95 4G. everything works, all the gauges, lights and everything in between. except my tachometer. My R/R failed and I replaced it with a Ricks R/R. the battery is at the voltage you mentioned but still Tachy no worky. help. Link to comment Share on other sites More sharing options...
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