tachometer

HONDA CRX
Avatar
ZEPOL
  • MEMBER
  • 2 POSTS
1990 honda CRX. 143,000. 5spd. My tachometer is all over the place. There is no noticeable change in engine speed. There are no strange sounds. I have observed this under many conditions and there are not any that correlate. Just have a very hyperactive tachometer. Thanks in advance.
Jun 14, 2007 at 4:02 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
BRUCE HUNT
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 3,754 POSTS
If the speedometer is not jumping around, I think the tach is bailing on you. Had a 1990 and had to replace it doing the same thing.
Jun 15, 2007 at 8:54 AM
Advertisement
Avatar
ZEPOL
  • MEMBER
  • 2 POSTS
thx for your response. i had heard that it could be caused by fault in the ignition system. i replaced the plugs, wires, distributor cap, and ignition rotor. this work for about 100 miles. might continue in this direction a bit more...if you have any thoughts...thx again
Jun 19, 2007 at 4:53 PM
Avatar
ITZ_2_EAZY
  • MEMBER
  • 3 POSTS
hi the tach jumping is do to the coil underneath the dizzy cap. only takes 5 min to change will fix your problem.
Aug 7, 2007 at 5:58 PM