courtney42

Tach decided not to work this morning. I have no idea where to start?
What can i do?

94 del sol si

courtney42

bump.

Does any one know witch connectors go to the tach sensor? Or where the sensor is?
How do i see if it is faulty?
Is this the right plug?

Former User

The tach gets its signal from the blue wire on the igniter unit in the distributor.

courtney42

I have no idea how to test the tach or to get it working again. Where do i start?

courtney42

bump

NMBB6

This seem like a dumb suggestion but are you sure the cluster is working properly? I'd check that first before going into the wiring.

courtney42

everything is working except the tach.
Today is was hot out side and when i got off work i started my car and it was working again!
So i guess some moisture got to the line somewhere and the heat dried it out?

I would like to know how the tach works though and where the line goes and where the sensor is so i can diagnose this if it happens again. Can some one explain it or show me some pics or have a link? I searched but couldn't find anything substantial.

Former User

See post #3 in this thread.

courtney42

That doesn't explain much to a lamen like me lol.
I am under the impression that it reads the amount of times the spark happens in a second?

The line goes under the engine and comes up on the driverside pillar?
in this pic?


What i am wondering is how this could suddenly stop working and then start working again a day later? Can moisture get in somewhere? the line is solid from the pillar to the distributor right?

Former User

Check whether the blue wire attached to the igniter unit is loose or corroded.