Hi can any one help I have a 55 reg R.C that is misfiring/juddering I have had the spark plugs changed, a new coil packs fitted and the car is even worse, im now too scared to drive it. Does anybody now what could be wrong with my car.
You say coil packs rather than coil PACK because not all are COP [coil on plug ] the 1.2 8v and 16v engine do misfire if the valve clearances are not done under routine maintenance. Now 675,000 is a lot of miles so I guess thats a typo. If you have a 1.2 then get the valve clearances checked otherwise you could end up with burnt valves. To check if you have a leaking valve get a compression test done.