07 lexus is250 rough idle... occasionally... it has a stored code p301... #1 cyl misfire... but the light is not currently on. im in nd so i cant help her... but as an older bro... i would like to find her a solution. she does not have a lot of cash. she is in the airforce and has access to the hobby shop... but has no mechanical knolage.. but is willing to learn and help. anybody available in her area to lend her a hand? i would be grateful