hi is anyone out there that can help, is the speedo on the dash contected to the coil pack. reason for this is when the car cold no problems but when the car gets optimum temp the speedo drops and then the stuttering and the missfire starts and to make it worse when the headlights get put on the car has a fit and fires on three pisrons and turn off the lights goes bak to four please help thanks mondy 1.8 52plate