Hello, I drive a Volvo 850 (BJ 1996) in which years ago a gas system was installed. For some time now he is having problems after starting. The MKL (Bello) starts, already after a few hundred meters he loses power briefly. If the engine is switched off and again the power loss is gone, Bello remains however. After two to three days it then starts to jerk on during the ride or swallows itself constantly. Since I had the gas system suspected, I checked it and the injectors re-set up, vacuum hose check, as well as the spark plugs have changed. At first everything was good. Also the engine purred again like kittens and did not listen any more like an old moped. After about 14 days the MKL went on again and everything started from the front. Then I had the lamda probe replaced, a new ignition coil should be installed again and the throttle flap checked again. Everything again I good. After about 10 days again the same. In the moment I started the battery again and then it starts to have a few times before the MKL before the start and then it has a start again.