69 Eliminator tach

My 69 cougar tach was reading around 750 RPM at idle, now it is showing only around 250 RPM at idle, has the tach gone bad ?

If you changed nothing else then yes it is.

Thanks so much Royce, I have another question. The rubber fender to hood bumpers, I can’t get them to fit in the hole, I even used lubricant ??
I’m asking you because “Your The Man”

Thank you!!

I have used a flat screw driver to get the in the hole.

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Leave them in the sun for a while to soften them up. A soapy water lubricant and a plastic door panel tool from Harbor Freight is what I used on mine.

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I will try that, Thanks so much

The hood bumpers I sand half the rubber “tit” away first. Then I lube them with Vaseline. I made a tool for this where I bent an old screwdriver 90 degrees to push the rubber in place.

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If you can, try to get to them from underneather so you can wiggle the “tit” and squirm them down in. I think I tied some twine around mine and then fed that into the hole so that I could pull them down while I wiggled them. Still wasn’t easy.

Thank you !!

Cool, Thanks