hi looking for some help please .i have a 2007 1.8 focus tdci which wont start i was told problem was probably egr valve .i got a blanking plate from ebay and fitted this.car ran prefectly for 5 days however now it wont start again very same as before engine turns over but just wont fire up occasionally splutters a bit as if about to go but wont.any tips would be greatfully recieved thanks.