if you turn the key and nothing is making noise check the battery if you are trying to start it and it is making noise press the gas a little bit so that the car can pump gas
into the engine
How do you know that it is your car?
It wont start
Your car wont start. lol
What have you welded ?
use jumpers
how does it stall if it wont start?
Don’t no
car wont start
catalytic converter?
Maybe Its The Muffler or the pistons hitting the engine
You may have overheated the engine or seized it.
lack of fuel