iv all so got problems with my rev counter but not like yours mate its just a ere as it gose up the revs no my 3dr tick over its ok at about 3,000 the motor is doing about 3,500 and at about 6,000 its 1,000 out the only way i new this was when martin had it on the rollers and fort the car had a miss fire but it turned out to be the rev limiter