Tach all over the place!

[John Haggerty]

Brothers,
I noticed it a little over the last couple of weeks, but yesterday big time. My tach is all over the place (never high). I suspect it is as simple as tightening the two end fittings. Might it be something else?
Thanks

 

[Dalvaras]

Tach sender

You could try cleaning the tach sender the big nut with twowires on top right side if the oil fill/ip gear housing. But that will usually only last a week or two. Replacment sender cost me $40 I think it was last fall. E5TZ-17B384-A TACH SENSOR ASY

 

[budtoh3zo]

While u are cleaning it take a ohm meter and see what it is reading, I cant rember the range it is suppost to be in, Mel will know when he gets a second to chime in.

 

[wwwabbit]

Replacment sender cost me $40 I think it was last fall. E5TZ-17B384-A TACH SENSOR ASY

Lucky! I got bent over for $110 cdn for mine from the dealer 'cause all the parts stores were looking at me like I was crazy when I was asking for one.
Mine was doing the same thing, working some times, reading low others, not working at all... New sensor fixed it right up.