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Getting a Misfire code under similar circumstances

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Hey all,

I'm getting a misfire (P0306) but only under very consistent circumstances (I guess this is a good thing!). If my 02 Boxster S sits for more than a full day, on initial start up I get a very brief (maybe five seconds)"loose spark plug" chirping sound and then the CEL flashes before solidifying. The car only runs rough for a total of about 30 seconds or less after the initial start up, it then clears up - sometimes the CEL stays on sometimes it shuts off. After that there are no other issues whatsoever during driving or even on start up for the rest of the day.. I've got a plug, coilpack, tube and o-rings on order but in my mind don't see how it could be any of those and be such a consistent issue.

Hoping for some insight!



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Could be you answered your own question - loose spark plug?!! I know its a pain but check it out.

Checked them all, first thing I did after finding the video of the chirping that was found to be a loose plug(s). Every one of them seems torqued properly..

Edited by tawheed
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