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Yep - unplug the battery for 15 minutes every time, just in case.
I have an '01 2.7 which I believe means it is E-Gas so there is no ICV. Instead, the throttle body modulates the butterflies to retain a good idle.
I guess therefore it is logical that the butterflies may have some gunk in them, and that would explain a rough idle and hesitation. Guess it is time to man up and clean the throttle body - was avoiding this, to be honest, as it looks fiddly!
John
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