Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
Hi,The P0441 is a evap purge fault... when it is trying to do its self test it is seeing unexpected changes to the engine vacuum. While this can be a bad purge solenoid (The vacuum solenoid with the larger hoses), it is very common for people to get vacuum hoses disconnected or even hooked up incorrectly and cause this fault. If you have been tracking down the misfire condition it might be worth double checking that nothing got unhooked or hooked up incorrectly. Otherwise the purge solenoids do fail with relative frequency.With regard to the P0301... we need to figure what is going on in that cylinder that is different from the others. Please pull the #1 and the #3 spark plugs (the cylinder nearest the drive belts is #1) and compare their condition to see if there is anything obvious. If you are unsure what you are looking at, you can post a picture here for me to review.
Then reverse the positions so the #1 plug goes into the #3 cylinder and vice versa, then clear the faults and run the engine... does the misfire return on #1 or does it move to #3?