Gene Wagenbreth

90 honda accord

driving to work this morning and for 3 or 4 seconds the tach jumped
up and down erratically. Never happened before. Only happened once.
Engine ran fine while tach was jumping. No other sysmptoms. Speedometer
seemed fine.

G

Tegger

Gene Wagenbreth <genewxxx@isi-OS4> wrote in news:fjmilr$o0v@venera.isi.edu:

> 90 honda accord
>
> driving to work this morning and for 3 or 4 seconds the tach jumped
> up and down erratically. Never happened before. Only happened once.
> Engine ran fine while tach was jumping. No other sysmptoms. Speedometer
> seemed fine.
>
>
>


Either:
2) Your igniter is failing. Replace it before you get stranded. Or,
2) the tach signal wire (blue wire) connector in the distributor is
corroded and making intermittent contact.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

jim beam

Gene Wagenbreth wrote:
> 90 honda accord
>
> driving to work this morning and for 3 or 4 seconds the tach jumped
> up and down erratically. Never happened before. Only happened once.
> Engine ran fine while tach was jumping. No other sysmptoms. Speedometer
> seemed fine.
>
> G

to add to what tegger says, it could also be a defective tach. my 90
crx had one. symptoms exactly as you describe. if you get a
replacement from a junkyard, it's about a 10 minute job to put it in.