OK, long shot...
I assume the Air con is at the front, then intercooler then water rad? Well looking through my grill i can see loads of little stones stuck in the fins of the front rad... so my questions go;
1) How do I remove the front GTi Grille?
2) Would removing all these stones have a beneficial effect by allowing more airflow...?
On a side note, does running a colder plug run better when engine hotter i.e. less pull when heatsoaking?
Cheers in advance,
Dom