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Wandering RPM

thostorey

thostorey

Regular Contributor
"I was cruising at 3800rpm whe

"I was cruising at 3800rpm when I noticed the rpm begin to increase up to 4500rpm without any discernible increase in actual engine speed. Then it dropped off to 38, hunted about some, up to 45 and back again. Then I was at my destination and it didn't do it on the return trip.

I had the same thing happen a couple of years ago and thinking it was the gauge, I replaced it.

I don't think it is the gauge this time, so what could it be? I'm thinking a loose ground wire or similar? I hate getting into the back of the instrument panel
angry.gif
.

Tom"
 
"Tom, those symptoms will like

"Tom, those symptoms will likely clear once you install your new electronic ignition kit and when you make sure the wiring connections in the coil and tachometer are clean and tight. I have also noticed those symptoms when the ignition coil wiring gets wet. Interestingly enough, I have noticed that the tachometer is usually not the problem."
 
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