I have an acewell fitte and running megasquirt the tacho appears to be reading too high I have set it at 0.5 I also have another tacho in line with this and this one reads too low. Could the problem be due to having 2 tacho ie signal being affected or do I need to adjust and output settings from the megajolt lite programme ??

2 Tachos? I think they will be confusing each other - can you just try disconnecting one?

[Edited on 4-8-10 by RazMan]