Hi sasuwo, Welcome to 2carpros and TY for the donation.
Misfire at a specific cylinder which is no.6 -you check and test the compression and injector for that cylinder.
Engine running rough or misfiring can be cause by the following:
1. Defective spark plug.
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
Monday, April 5th, 2010 AT 3:02 PM