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83 Monte Carlo GM factory in dash tach + LS 2003 Lq4

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Old 11-23-2014, 12:48 AM
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Default 83 Monte Carlo GM factory in dash tach + LS 2003 Lq4
Hi

Trying to get my factory tach to read right.. seems the GM Lq4 PCM is feed a 4 cylinder tach output as the tach is reading 350 rpm at idle...

What has anyone else done to fix this problem?

Thanks
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Old 11-23-2014, 05:04 AM
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It's a simple fix in the tune. Everyone has to do it for factory tachometers when they do a swap.
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Old 11-23-2014, 07:47 PM
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I'm using HP tuners - so which field needs to get tweaked?
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