Hello from Estonia! 
I have a problem with my 420si. It feels like all the cylinders aren't working correctly. If I play with gas pedal, the rpms get higher but it doesn't feel that everything is okay and from the exhaust system comes pop and pang sounds. It started on one morning, but I got to drive with it. However I felt a little power loss but it was still driveable. Later that day it lost all the power, engine started rattling and then it died. A few months ago, I changed both fuel filters and also the fuel pump. I have also changed the spark plugs and spark plug wires. And after that the car worked fine, but three days ago this happened. Is there any common problems that I should look over or does anybody had same problem? For know I have tested the fuel pump and fuel filter and they are good.
Thank you in advance
I have a problem with my 420si. It feels like all the cylinders aren't working correctly. If I play with gas pedal, the rpms get higher but it doesn't feel that everything is okay and from the exhaust system comes pop and pang sounds. It started on one morning, but I got to drive with it. However I felt a little power loss but it was still driveable. Later that day it lost all the power, engine started rattling and then it died. A few months ago, I changed both fuel filters and also the fuel pump. I have also changed the spark plugs and spark plug wires. And after that the car worked fine, but three days ago this happened. Is there any common problems that I should look over or does anybody had same problem? For know I have tested the fuel pump and fuel filter and they are good.
Thank you in advance
