The rev counter on my car has just started to act a little funny. It sometimes moves up and down quickly for no apparent reason. The car still runs fine, its just kinda weird watching it fly up to 4500 rpm, then down to 1200 rpm with the engine at 3000 rpm.
If anyone has any help, be very grateful. It happens mostly when I am accelerating or at cruise around 2-3 thousand.

 

Someone must know or have an idea!

 

that is really weird....does your engine rev that high also or is it just the needle?

 

yea im a little confused...are you saying your motor is going crazy, or just the tach?

 

slipping clutch or vacuum leak?

 

on the ed(ef) civic platform the tach is known for jumping around like that when the motor is not actually fluctuating. it's caused by teh igntor going out. i guess it might be that(?)