Tach goes iradic after 4K
08-01-2011 | 11:56 AM
#1
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From: Lake Texoma, OK
Tach goes iradic after 4K
I put a new dash and livorsi gauges in the fever this spring. The tach works fine from 0-4K. Once I get past 4K it starts jumping around between 0 and 2K. The engine (carb-502) is running strong so it has to be an electronic problem. Any ideas on what to look for will be appreciated...
has been tried and doesn't work.LOL
Thanks!
has been tried and doesn't work.LOLThanks!
08-02-2011 | 09:24 AM
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From: Lake Texoma, OK
08-04-2011 | 08:02 PM
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From: LANCASTER, NEW YORK 14086
TS27,
Sorry I didn't get back sooner. The reason I asked about ignitions is I chased the same demons with an MSD set-up. I thought the factory guys were giving me a line when they told me the tach trigger wire was being affected by the high energy output of the ignition system. They said to make sure the trigger wire was well isolated. After trying everything I thought would solve it I took their advice. THEY WERE RIGHT! Sounds like you have a similar problem.
Dave
Sorry I didn't get back sooner. The reason I asked about ignitions is I chased the same demons with an MSD set-up. I thought the factory guys were giving me a line when they told me the tach trigger wire was being affected by the high energy output of the ignition system. They said to make sure the trigger wire was well isolated. After trying everything I thought would solve it I took their advice. THEY WERE RIGHT! Sounds like you have a similar problem.
Dave
08-05-2011 | 06:59 AM
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From: Lake Texoma, OK
TS27,
Sorry I didn't get back sooner. The reason I asked about ignitions is I chased the same demons with an MSD set-up. I thought the factory guys were giving me a line when they told me the tach trigger wire was being affected by the high energy output of the ignition system. They said to make sure the trigger wire was well isolated. After trying everything I thought would solve it I took their advice. THEY WERE RIGHT! Sounds like you have a similar problem.
Dave
Sorry I didn't get back sooner. The reason I asked about ignitions is I chased the same demons with an MSD set-up. I thought the factory guys were giving me a line when they told me the tach trigger wire was being affected by the high energy output of the ignition system. They said to make sure the trigger wire was well isolated. After trying everything I thought would solve it I took their advice. THEY WERE RIGHT! Sounds like you have a similar problem.
Dave
08-06-2011 | 08:03 AM
#10
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Tach
Thunderstruck is exacly correct. It is a loose wire to the negative side of the Coil ground or bad/ loose spark plug wires. Also check the ground on the coil. It gets its ground from a bracket and if the bracket is not grounded hence the iratic signal. Hope this helps Good luck
