ok i have had the cover off ages now, i know its a common fault to over heat coil packs when your cars not so standard, the new cover has been sprayed and big holes cut into it. As for slither it will be your packes causing you probs, mine is the tune from the remapped ecu the fuel is prob not high enough ron, any ways back on topic good luck with search for parts. I may beable to sort some myself if you get stuck