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

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11-23-2014 | 12:48 AM

efi-diy

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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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11-23-2014 | 05:04 AM

LS1MCSS

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From: Dover, Arkansas

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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11-23-2014 | 07:47 PM

efi-diy

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I'm using HP tuners - so which field needs to get tweaked?

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