My tach is fried, yes?

[Grec]

When I hook up my tach lead to the neg coil post, the engine runs horrible. I suspect there's a short in my tach... ?

How does this happen? As far as I know, when I took the car to get the motor rebuilt, the tach was working fine. Could having hooked up the lead to the positive coil post by mistake could have caused this?

I just hate when you bring your car to get worked on and get it back with a new problem. Seems coincidental that things just happen to go tits up when in someone else's hands. 

That said, the motor itself is great... but still. Grrrrrrrr.

[dodj]

Yup. You can get a rebuild kit and replace the guts and still looks stock. RT.eng is one supplier of the kits.

[Racer57]

I had to replace mine. Classic Industries sells them. They are OER brand.

[Chryco Psycho]

If the tach was shorted / grounded the engine would die but yes there must be some issue with the tach causing issues with the ign the upgrade electronics are worthwhile as the technology in 69 when these were designed was stone age by comparison .

[Grec]

That's what I figured... short in the tach.

Thanks guys.

Heh. Slowly but surely the list of parts I haven't replaced/rebuilt is getting shorter and shorter. :-)