onetrickpony

My tach is stuck at about 4 grand. What is it that makes the tach work? How can I fix it? I stopped working then started again and then stopped. It is kind of annoying me so I would like to fix it.

PONY GUY

is it the tach in the cluster or a after market tach like autometer????

onetrickpony

Its the stock tach in the cluster.

PONY GUY

sounds like youhave a ground problem or the plug in the diistibutor the goes to teh tack is loose or bad

mattdel

the tach is actually controlled by the ignition module, reading off the distributor. unless the distributor is messed, i'd check the module. it has an output wire that puts out incremental voltages that control the tach.

onetrickpony

so exactly where is that located? Not trying to be stupid. I just do not know where to look. Is that the piece that has the wires that goes into the dixxy? Thanks.

onetrickpony

is it the tfi module?

mattdel

It will be the TFI module mounted cross-ways on the distrib.It will be black or gray,and flat,with a six-wire plug.you need a special socket to remove the 2 little screws that hold it on the distrib.