if you just had engine replaced 3 weeks ago; then you find out your car has gas

Yes he had to deal with the fuel system when changing the motor such as injector fuel railing and hose at the motor, is this a new motor if so what is there warranty, use motor is my shop only has a 30 day warranty only on the motor, My yes was if you got a new motor? each shop has different warranty programs lots of question needed to be ask,