Tach Help

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Jan 11, 2019 | 11:37 AM

wolvercote

Thread Starter

Intermediate

Joined: Jun 2018

Posts: 46

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Tach Help

1974 LT1 : Installed elbow connection on tach cable and connected everything but tach needle would not move so connected cable end to drill and still nothing so just thought I would put drill in REVERSE! and that made the needle work and tach works as it should. What is wrong?

Jan 11, 2019 | 12:25 PM

Easy Mike

Team Owner

Joined: Jun 2000

Posts: 38,923

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From: Southbound

Cruise-In II Veteran

Sounds like the tach drive cable is not plugged in well at the distributor. FWIW: if you clock the distributor correctly, you can eliminate the elbow connector.

Jan 11, 2019 | 01:31 PM

blue by you

Burning Brakes

Joined: Dec 2005

Posts: 1,179

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From: cranford nj

Take the cross gear out of the dizzy it's most likey shot

Jan 11, 2019 | 07:45 PM

Lyndwood

Pro

Joined: Apr 2015

Posts: 551

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From: Warrington PA

Quote:

Originally Posted by Easy Mike

Sounds like the tach drive cable is not plugged in well at the distributor. FWIW: if you clock the distributor correctly, you can eliminate the elbow connector.

^^^^^^^^^This for the win, i was going to use one of those elbow's till members here steered me right, clock the dizzy and be done with it!

Jan 11, 2019 | 08:03 PM

Gordonm

Race Director

Joined: Dec 1999

Posts: 19,610

Likes: 778

From: Forked River NJ

First therr is no such thing as a 74 LT1. They stopped in 72. As for the tach yes it operates in reverse. Most likely the cross gear is toast as it is a common thing to happen. The right angle device is just because the dist as said above is clocked incorrectly. Yank the dist rebuild the tach drive portion of it. You may need a new shaft and cross gear but it can be done. When you reinstall it set it in correctly and ditch the 90 degree adapter.