venturi gas plant at volvo 850 spins

hello, I’ve got myself another elk, practically immediately with gas system, because such an elk is nevertheless very thirsty 🙂 only the car always goes off when I drive with gas… then the speeds go rapidly into the cellar and zack is all off… is a bit annoying if you always have to buy the expensive gasoline because the gas system doesn’t function properly… so the engine is a 2 liter with 211 ps and an automatic transmission, and the gas system is from venturi and front is a s chalter by tartarini.. also the gas tank indicator doesn’t work… maybe that’s still important… and if we’re already there, the controls need to be halved… so far I haven’t found anything for this motorization 🙂 I really hope you can help me here, I’m a little desperate… with gas systems I don’t really know…