Bought a 2001 mk2 Punto about 6 weeks ago, decided to clean the spark plugs(which were filthy) Anyway cleaned them up, put it all back together, then started it... but was juddering like a misfire... re checked all the plugs n ht leads.. n now have oil on the plugs?? Restarted it and did the same thing... But now it won't start atall, it tries but wont start. Checked the fuses none blown, no trapped wires etc... any ideas??