RPM fluctuation

[rivetdriver]

I have a Ems D10 installed in a F! Rocket with injected 6 banger.
the RPM reading fluctuates a lot .
Any guesses???? :-[

 

[dynonsupport]

The generic advice is to increase the resistor on the P-plead pickup wired (30K is spec'd, you can go 60k, 100k, or 150k by trial and error). You can also use the tach generator that Vans sells for use with their own branded tachs. It screws into the tach drive and outputs a nice 12V pulse.

 

[721CP]

I have a Continental O200D with my Skyview panel will this resistor change work for me, It is fluctuating at the top end of scale

 

[jakej]

Most likely

Jake J