Hi guys i have a astra g 1.6 sxi 2002 and as i was going to work 2 things happened that shouldn't off.
1) as i was going up the hill approaching traffic lights my car started shuddering for no reason.
2) as i stopped at the traffic lights staionary i noticed my speedo needle just shot straight up to 100mph and back down for no reason, weird i thought so lights change and carried on driving eveything seem fine from there.
anyone know why it's done this? any help appreciated thanks
P.S the car is on 36,500 miles and cam belt has been changed