the first thing i would look at is the 2 wires into the tacho if the connection is a bit iffy that will cause the prob and to check if its the tacho itself just join the black with white stripe wires together to bypass the tacho alltogether
he is the little fella that looks like a garden knome hahhahahhah 4ft 2 he is steve when he comes around my place my daughter yells out hey dad the short guy is here
ok guys i have brought a new project so i need all my 1200 and datsun stuff gone the l series turbo setup all of it has to go the only thing i am keeping is my longy ute all items are in birkdale queensland or let me know what ya need