Tachometer issue 94

[Therkhan7_3Turbo]

Is there a way to test the circuit, and if so what readings am I looking for ?

My factory tach is useless, when I go wide open after about 2,000rpm it just does what it wants and will peg pass 4k rpm once I get to what I assume is 2900-3200rpm... I'm assuming this is what's causing my extremely hardshifts at times. Can I test the signal at the cluster ? Am I looking at getting my cluster fixed or tsom?

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[Therkhan7_3Turbo]

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Here's a video showing the issue.

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[Scooch]

Unless you recently changed it I would be looking at the tach sensor before the cluster.

 

[Therkhan7_3Turbo]

Unless you recently changed it I would be looking at the tach sensor before the cluster.

Brand new out of the box Ford sensor. Old one looked new too.

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[ClifFord]

Mine was craping out to. Eratic like what you are describing. It was the cruz controle module. On day I cought the blue smoke of death from under the center of the dash and then the tach, speedo, and odometer all went out. I haven't had luck finding those modules except pic a part or doner. But it's a big ass obs. Not alot of speeding. And I just go by feel on the shifts.

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