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24 Nov 2020, 07:36 pm
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Excess Pre-ignition in My '05 GT
I suppose any pre-ignition is excessive, but Pressing and holding the loud pedal comes with more than I'd certainly like.
Running the best gas and brands I can around here, but the 91 octane doesn't seem to be enough. No codes, just too much ping. PCM replaced a while back, and don't think I got unintended performance upgrade, so... Thoughts? Thanks in advance Bob in Liberty MO 
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24 Nov 2020, 08:11 pm
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Re: Excess Pre-ignition in My '05 GT
Carbon buildup in the cylinders?
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