starts then dies

What is your question?

I change the exhaust manifold do to my backyard mechanic not properly installing my exhaust system from front cat to muffler. car was running fine with just a lil rattle do to be bolts missing. now it starts will run for 30 secs then die. I didn't touch anything but manifold and 02 sensors

What makes this problem better or worse?

It's worse when. you start the engine up

How long has your 2014 Chevrolet Equinox had this problem?

Soon after I change the exhaust manifold