PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Simple dumb question lol

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Old Jan 23, 2009 | 09:58 AM
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Silver2000WS-6's Avatar
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Default Simple dumb question lol

Ok I think I know the answer but I want to make sure before I do it. Will completely unplugging my pcm erase my tune? I don't think it will but I just want to make sure before I do it and then have to pay to have it re tuned lol.

Thanks, Chase
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Old Jan 23, 2009 | 10:29 AM
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It will not erase the tune but will reset the fuel,
idle air, etc. trim values. So it may run a bit funny
until it re-adapts, but you will end up back where
you started eventually.
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Old Jan 23, 2009 | 11:16 AM
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Originally Posted by jimmyblue
It will not erase the tune but will reset the fuel,
idle air, etc. trim values. So it may run a bit funny
until it re-adapts, but you will end up back where
you started eventually.
Interesting, does it generally take very long for it to adjust back? Is this the same effect as unbolting the battery terminals since obviously power is no longer being supplied to the pcm? Thanks for the answer.

,Chase
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