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tach queston


vince87ranger

vince87ranger

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i got a instrument cluster out of a 88 b2 with a 2.9 v6 and wondering if i can put the tach into my 87 ranger 2.3 4cyl. wiring i can figure out, but will the tach read corectly when i hook it up or do i need to find a ,tach, out of a 4cyl truck?
 


superds

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The tach will not work correctly. My understanding is that you can have it recalibrated to be used with a different number of cylinder, not sure what that entails to recalibrate it.
 
low_five

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i tried going from a 88 2.9 cluster with a tach to a 88 2.9 without a tach, and the wiring harness was different and the plug that plugged in to the cluster was different. if those two didnt plug and play, then yours definetly isnt. you can probably make it work if you figure out which wires need the tach input, but then you have to deal with what the guy above me said, which is that you need to set the tachs for 4,6, or 8 cylinders. I doint even know how you would to that on a factory tach.
 
vince87ranger

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ok, but on the small circut board behind the tach ther is a spot for another stud that isint used, and infact ther isint a stud there. i was thinking if i put a stud in this spot mabe it would be for a 4cyl truck? did ford ever put a tach in higher model 4cylinder trucks or am i going to be looking for a hens tooth?
 
vince87ranger

vince87ranger

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here is the hole that has a spot on the circut board behind the ribbon paper circtry. im hoping that this is the 4cylinder tach input hole that i can just soder a stud into and hook up. but does anyone have a 4cylinder tach out that can confirm this?
 
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