hi i have a 1997 ford escort calypso 1600 when the car starts i can hear a tapping noise till the engine warms up then that noise stops but when the car starts warming up it jerks about and the idle flickers up and down around the 1000 mark any ideas or help would be very good.

jay, September 2008

im pritty positive that you have an air leek so the tapping noise is the seelf idiling speed aduster which wount work proply because it needs the rite amout of air which causes the engine to jerk about your engine wile try to stall then the self idiling aduster will try to pick up the reves up put because of the air leek its confused.
So u need to find the air leek and ither tape it up or buy a new pipe.

callum, November 2008