[richard]

have an 01plate 1.8comfort petrol,engine missfires on start up,revs by itself, then goes to stall as you pull off.not good.replaced throttle sensor and fuel pump.still doing it.please help
/garage said engine management system,l

 

[craig-michael]

unfortunally the garage could be right,but the first thing to try would be to clean out the throttle butterfly as some times if it is carboned up it sticks and causes the engine to cut out and cause the vehicle to rev up on its because the internal logic can not store the idle speed correctly.
i hope this helps,craig.