"Jumpy" Tachometer
 

I am experiencing a weird problem. My car had a tachometer installed and was working fine. I ended up doing the clutch in my car and in the process broke the RPM signal wire that goes from the tach to the blue wire on the distributor. I resoldered it but the reading is not accurate. It is very "jumpy", for example at 3000 rpm it will actually jump to 5 or 6000 rpm.

This only happens when driving not at idle. I am thinking that the wire does not have a good connection so then the car moves and air passes through, this causes the wire to vibrate and not get an accurate reading.

Anyone else experienced anything like this?

the resistancy (or whatever it is called) in the wire is not correct anymore.

Oh ok, any ideas how to fix that?

For anyone that cares, what had happened was that the blue wire inside the distributor was not tightly on it's connector. I took off the cap last night and put it on tightly.


Works great now.

This was a suggestion given to me by someone on TCC.

Its not the wire, its the pick up lead inside the distributor failing, very common on old civics.