tach working some times but not reading correctly

[shredeagle]

is this something that can be repaired? 81 4cyl

[WoodenBirdOfPrey]

The general consensus seems to be that the original AMC tachometers aren't very reliable due to the design.  Seems like replacing it with another one will just be a temporary solution until the next one fails too.  The by far cheapest and most stock-appearing option I've seen so far is fitting the factory in-dash tachometer for an early 90's I-6 Ford truck into the stock Eagle gauge cluster.  Vangremlin did this first and did a nice write up on it, check it out:

http://forums.amceaglenest.com/index.php?topic=38475.0

I replaced the digital clock in my Eagle with one of these and I love it.  It's an easy job to do with some basic fabrication skills (some cutting with a Dremel mostly) and a couple free hours.  It matches the factory cluster very nicely, only another Eagle owner would be likely to notice it isn't the original equipment one.  The big benefits of this over getting another factory Eagle tachometer is the Ford units seem to be pretty reliable in comparison, and they're very easy to find and cheap in salvage yards.

[eaglebeek]

@WoodenBird...shredeagle's bird has a 4-cyl and the Ford I-6 tach won't read right.

@shredeagle...Eagle tachs, like WoodenBird said, are prone to problems and are probably not worth much effort. The only answer I know of is an aftermarket tach. Do check for loose connections, a poor ground and broken wires, though, before you throw in the towel.

[vangremlin]

Shredeagle sent me a PM and like eaglebeek said, he has a 4 cylinder, so I don't think the tachs I've been pulling will work with that.  I told him I would do a little research and see if there is anything else that might work for him.