Holden Engine Idle High

Car Was Running Sweet! Zero Problems. Recently When I Started It, It Revs To 4,500 Rpm's And Stays There. No Vacuum Leaks, No Hoses Off...

Whilst Towing A Heavy Load I Roll Jump Started Down A Steep Hill In First Gear. I Only Rolled A Couple Of Meters Then Jumped It. The Engine...

I Have A Holden Astra . Recently A Problem Showed Up. My Engine Rpm Goes Way Too High With Low Speed On Road . Eats Up Fuel Really A Lot....