I've been getting CEL codes P0304 or sometimes both P0302 & P0304. Since these are indicating cylinder misfires on the same (Driver's) side of the engine, does this normally point to a suspect coil pack ? When I clear the codes, they disappear for a week or less.
I replied but for some reason it didn't show up :(
A misfire can be caused by many things (ignition & fuel related), I wouldn't necessarily assume that it is the coil packs just yet. See if you can run a few tests and get to the bototm of the misfire. It will be cheaper than trying to replace your components.
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Check the plug wires first, especially if you have not changed them in a long time.
Check
Etienne
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