Kevinlfc17
November 2, 2012, 11:58 am
Hi I have a 2003 mondeo 2.5v6 now and again the revs go up and down on idle there is no misfire or lack of power what could that be
mintalkin
November 2, 2012, 4:53 pm
it could be a blocked PCV valve or an air leak on any of the pcv plastic lines.