Most likely just the misfire, but after repairing the intake leak, you will be able to trouble shoot the other issues. It is an older vehicle so a bad EGR valve and bad purge valve are very possible. The P0441 can possibly just be a faulty gas cap. But start with what you know to be wrong and work your way from there. The EGR is controlled by manifold vacuum, so depending on where the leak is into the intake, this can effect EGR performance as well.
Thursday, November 17th, 2016 AT 6:34 AM