Vauxhall Zafira Engine Misfire

I Have A The Vehicle Listed Above 1.9cdti. While Driving At Normal Speeds 20 - 30 Mph The Car Seems To Rev Up To 30000 And Then Jolts.

Have Misfire In Cylinder 2 Changed Spark Plugs Misfire Still In 2 But Number 4 Was Oily And Full Of Gunk Why Would It Be Like That? Changed...

Hi My Car Does Not Run Right, It Ticks Over Ok,it Drives Ok On High Revs,but When You Push Excelerator It Flutuates Up And Down Like Its...