Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

"Jumpy" Tachometer

Old 02-Apr-2006, 10:56 PM
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"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?
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Old 03-Apr-2006, 04:25 AM
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the resistancy (or whatever it is called) in the wire is not correct anymore.
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Old 03-Apr-2006, 10:33 AM
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Oh ok, any ideas how to fix that?
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Old 04-Apr-2006, 03:49 PM
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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.
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Old 04-Apr-2006, 04:40 PM
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Its not the wire, its the pick up lead inside the distributor failing, very common on old civics.
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