Got a 06 rtmagnum awd hemi car acts crazy and cuts off when i fill it up. I recently put a motor in this car and had to replace both fuel pumps but still having problems with it cutting off when you put gas in it.

There is a documented issue with 06 LX platform vehicles related to the fuel vapor valve on the gas tank. The only solution is to replace the tank itself. Contact a dealer you like and mention the issues and the customer satisfaction campaign and they should replace the tank at no charge

I dont do any general maintenance. We do performance upgrades. I would have to refer you over to bevil automotive in north Richland hills