I am having a problem with the tach dropping out after possibly 2800-3000 RPM. It just cuts out and drops out. I connected the lead from 5k Turbo Kostal directly to the input line form the 4k harness. It is pretty important for me to get this working on this car so any help would be appreciated. TIA -Tim 01 S4 4KTQ - Club Rally Car #866 100s Wagon