Need help troubleshooting the tach & tach drive system. Problem - tach doesn't move off 0 from idle to WOT - With cable end off of the motor adapter is square and seems to lock into square hole on motor... if I take cable end off off the adapter and turn it by hand the tach turns if I [u:c298814d4b]keep[/u:c298814d4b] pressure on the end (pushing it into the cable jacket) reconnect it and it works for a minute then tach starts to slip back to 0. Can anyone suggest if I should start with a #1) new cable? OR #2) disassemble dash and look for trouble there? OR #3) replace all?, OR #4) something else I haven't suggested? Thanks in advance for the ideas.