My dear friend, I too own a matiz and is a fan.
If you are in Bangalore, please show it to Rai Motors in Hebbal.
They were the authorized dealers and I got some major works done there.
They should definitely be able to help you out.
If everything is ok with the bore/sleeve and the piston/rings and the head gasket, you may also need to check the spark plug wires. (The ignition cable coming from the distributer to spark plugs and the cable from the ignition coil to the distributor.
Regards
Jithesh
by sensing engine RPM it can teel if engine is not running smooth by sensing the rotation of the rpm's of the engine.
why would it no be
Misfiring on a petrol injection engine is caused due to incorrect ignition timing. As the engine rotates, the timing determines when each piston fires or ignites.
When the engine is cold or when it is misfiring.
Check your engine timing, it may be too slow.
Engine cylinders # 1 and # 4 are misfiring
Timing belt. misfiring engine
The number 5 engine cylinder is misfiring
The P0300 code indicates random engine misfiring. The P0303 and P0304 codes indicate the cylinder #s where excessive misfiring is occuring.
Bad plugs/coil/wiring
The catalytic converter
It could be (a) misfiring cylinder(s). Check the condition of your plugs and wires. Also, check if your engine mounts are not worn.