Tach Problems
 

I replaced the coil, ignition moduleTerminal board plugs wires and on my 91 and have developed a tach problem. The tach now reads double what the actual rpm is. Have checked for arcing and connections. Anyone have any ideas?

rpm
 

Try the actual connector on the ditributor? Maybe some one spliced the line one time and you are getting the feed from another source. Do you have an msd or anything else hooked up?