Printable Version of Topic

Posted by: jd66921 Aug 3 2006, 06:06 PM

Hi,

My tach decided to die on me, I think. It has always been bouncy, but usually
settled down after a little while. Last week, it died, no reading at all. Now it has
come back to life somewhat. It seems to read ~1/2 what it should.

So, I am trying to decide if it is really bad, or whether it might not be the tach
itself. I have gone through all the wires and they seem to be tight. Do you think
a new one is the right thing to try? I don't have a spare...

Thanks,

Jeff

Posted by: Cap'n Krusty Aug 3 2006, 06:12 PM

/4 or /6? If /4, points or electronic ignition? Any aftermarket ignition unit? If a 6, stock ignition with BHKZ, or aftermarket, with or without the tachometer drive unit. The Cap'n

Posted by: jd66921 Aug 3 2006, 06:17 PM

QUOTE(Cap'n Krusty @ Aug 3 2006, 05:12 PM)

Posted by: Dave_Darling Aug 3 2006, 07:04 PM

If the car is running fine, then either your tach took a dump on you or the wires are messed up. Unplug the tach wire from the tach and the coil, and see if it connects to ground at all. If there is any connection whatsoever, the wiring is suspect. If not, then the tach is.

--DD

Posted by: jd66921 Aug 3 2006, 07:11 PM

QUOTE(Dave_Darling @ Aug 3 2006, 06:04 PM)

Posted by: r_towle Aug 3 2006, 07:28 PM

Start easy...
make sure the wires to your coild are firmly connected and they are not touching the engine...i.e. the coild wiggles loose and turns..the wires touch...

BTDT..

Rich

Posted by: brant Aug 3 2006, 08:18 PM

Jeff,

have you changed points lately?

I've seen weird readings like that from my car when it used to have points and things were in need of attention.

check your point gap and set the dwell

brant