Misfiring Issues

[jpspeed]

Fault Code PO3OO Mulitple Misfire on my chevy kalos sport. the car will misfire then the engine management light will flash until misfire stops then car will be fine.
Ht leads and plugs replaced, new coil pack and lambda sensor tested and working yet it still happens, usually when cold and when you load the engine. any ideas please?

[daymurphy]

Check the cam and crank sensors.

[Nkakamasembe]

Have you checked the readings against spec of the Manifold Absolute Pressure sensor or the coolant temp sensor , you could be getting lean fuel mixture with engine cold !!! some times even the obvious may be over looked eg air intake hose clips that are loose.

[jpspeed]

havent got a clue how to do that i supose i have to take it to a garage for that?

[jpspeed]

it was a sticking valve thanks for your help!