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1989 Other Ford Models Tacometer Misreading

Tiny
ROB FERGUSON
  • MEMBER
  • 1989 FORD
  • 6 CYL
  • 4WD
  • MANUAL
  • 15,000 MILES
My 1989 Ford Bronco II XL's tach needle will periodically swing wildly or show an excessive rpm reading. There does not seem to be a pattern to when it behaves in this manner but is a random occurence.
Is there a faulty electronic pick-up or sender unit that is causing this situation?
Your assistance is greatly appreciated.
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Monday, December 24th, 2007 AT 1:47 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You might want to check the coil's positive and negative connections-could also be the tach itself out of calibration.

The tachometer is always hooked-up on the secondary circuit of the ignition system
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Monday, December 24th, 2007 AT 2:59 AM

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