Author Topic: tach problems  (Read 868 times)

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Offline otis423

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tach problems
« on: March 08, 2017, 09:30:31 PM »
hello, just had my motor rebuilt in my 10th anniv..400 4 speed...tach will sits a 500rpm and when i start it..it jumps to 3500 rpm and pretty much stays there, but i noticed when i hit the power window switch it jumped around,,has me confused, clock also worked and now it is not...any help would be great.....one more question...one red and a smaller green wire coming from passenger side, red goes to alt. where does the green wire go? to the actuator for the choke?...thanks in advance for any help

Offline Stringer

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Re: tach problems
« Reply #1 on: March 11, 2017, 12:14:55 AM »
Sounds like a ground problem. Do you have the U shaped bracket under the steering wheel installed? Is everything together the way it should be?

Offline otis423

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Re: tach problems
« Reply #2 on: March 13, 2017, 04:59:03 PM »
ya the steering wheel column is all hooked up ...it quit jumping when i hit the window switch, but now when i start the car it jumps to 3500rpm and stays there, if i give it a little pedal it moves down a little instead of up...all other gauges are working...

Offline ta78w72

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Re: tach problems
« Reply #3 on: March 22, 2017, 11:48:52 AM »
There's a ground inside the tach that may have failed.

Offline otis423

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Re: tach problems
« Reply #4 on: March 31, 2017, 09:17:27 PM »
thank you for the info..will have to check that out