SPONSORED LINKS

Tachometer hand "dancing"

Tiny
WPOORE94
  • MEMBER
  • 2017 NISSAN ALTIMA
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 13,800 MILES
Just a quick question, I bought this car about a week ago and it is running and driving fine but the tachometer hand seems to bounce just a little when coasting or going at a steady speed. It does not do it while at idle or when speeding up. What could be causing this?
SPONSORED LINKS
Saturday, May 5th, 2018 AT 6:40 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,924 POSTS
Hello,

When this happens it usually means the ignition system is back feeding into the electrical system caused by a bad ignition coil or spark plug (common.) I see the car is fairly new which makes me think a spark plug was cracked from the factory or just a bad coil.

Please remove the plugs and coils to inspect for burn marks (black tracer) which means you have found the problem.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

and

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please run this test and get back to us.

Cheers, Ken
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, May 6th, 2018 AT 5:25 PM

Please login or register to post a reply.

Related Instrument Cluster Gauge Tachometer Content

VIEW MORE

Sponsored links