plugs

[revhead]

my 99 had a the same problem ,get the injectors cleaned ,also swap around the coil packs to see if the problem moves

also just for personal info the 99 and 2000 models were not built to run 98 or 100 ron fuels ,

i ran these fuels and in no time flat the motor started melting the tops off plugs etc

Yella or Maj would be the ones who,d no more