07-03-2018, 03:49 PM
The tacho is driven by the flywheel sensor (crankshaft position sensor). It feeds it's data to the ECU, which in turn sends a signal to the tacho.
Since there's no drop in engine RPM I'd rule that out (reading/recording live data with PP2000 or a ELM327 would prove it for sure).
I'm guessing it's either a bad connection on the back of your instrument cluster, might also be a ground fault of some sort.
Since there's no drop in engine RPM I'd rule that out (reading/recording live data with PP2000 or a ELM327 would prove it for sure).
I'm guessing it's either a bad connection on the back of your instrument cluster, might also be a ground fault of some sort.