On my '88 Camaro, I did the capacitor swap that everyone does when a tach reads incorrectly. Anyway, the tach always worked before, it just read super high. I swapped in a new capacitor, and the tach started reading correctly. However, the next time I started the car, the tach needle stayed at zero, and it's done this since.

Any ideas? Could the capacitor I put in have come unsoldered? Did I really mess something up?

 

I would pull it back out and double check the solders. Then check and make sure the capacitor didnt die.

by the way, which capacitor is the right one? I just swapped mine, to what I thought was the right one and it made it twice as bad.

 

https://www.thirdgen.org/forums/elec...ach-fixed.html

Here's the thread I used to get the right capacitor.

 

there must be different tachs in these cars. I did the exact same capacitor and it made it twice as bad as before.