partha

Hi, my Lancer 2003 ES vibrates at stop sign and acceleration is not very smooth (sometimes it struggle to accelerate and some time it really fast) and misfire with code P0301. However, it only happens after running for 20 to 30 minutes, initially car runs perfectly fine. Here what I did so far changed all spark plugs, changed valve cover gasket because while I was changing spark plug, I noticed spark plug in cylinder one covered with oil. These changes made lower the frequency of vibration but it still there. Then I swap the ignition coil just to make sure its not the ignition coil but I am still getting misfire code from cylinder one (P0301), which means coils are good. Could it be Fuel Injectors or engine mount? Or something else? If it were engine mount, it should vibrate most of the time while idle and when I change the gear but that’s not the case. I am really confused. Can one please enlighten me?

partha

any idea?