[av0789]

hey all, my car has been shaking roughly at startup and until the engine gets warmed up. the CEL flashes and then stays constant once it stops shaking. I went to Autozone yesterday and the code came out p0301 meaning a misfire on cylinder 1. So I swapped the coil pack from cylinder 1 to cylinder 2 to try and fix this issue. Today I went again to see what code it is and now it says p0300. (the original code was never cleared out so I'm thinking it has the original cylinder 1 misfire plus now the cylinder 2 misfire because of the coil pack swap) I'm leaning towards thinking it is that coil pack but I dont wanna order the part without being sure. The spark plugs are all new and the car was just serviced quite recently. I'd really appreciate any feedback.

 

[i68k]

you most likely got the p0300 random/multiple misfire because you didnt clear the previous misfire code. its rare to have the ses flashing for just a misfire, might mean you have more than one coilpack failing at startup. assuming you already checked and changed the spark plugs, i believe the cam sensor could give you a cylinder 1 misfire as well. have you changed the cam&crank sensors recently? i wouldnt wait too long to fix this, the unburned fuel is corrosive to emission equipment.