Engine Mechanical problem
1998 Other Vauxhall Models 4 cyl Four Wheel Drive Manual 130000 miles

ive just had myhead gasket changed ,,when i start car it idles fine at about 1000rpm but after a few minutes drive the car starts idling very high 2000rpm or there abouts ,,could it be my mass air flow sensor ??? although symtoms dont really match ,,choke hanging???