[Jessicasdd]

Engine was replaced in August 2020 with 2.2 ecotech from an 09 Cobalt LS. So I don't know if I should get help here or go to the Cobalt section so I'll start here.

Car ran fine after the engine was replaced. I blew the first engine at 126,000 miles. It had the timing chain issue. Anyway it ran fine but I was getting a P0446 code and was having issues putting gas into it. That comes back to either the purge or vent valves. I have not replaced those yet.

Right before Thanksgiving 2020 it had a small leak somewhere in the exhaust because I could hear it. While driving it the pipe broke open right before the flange where it connects to the exhaust manifold. It didn't fall off, just opened the hole larger. I had to replace that entire pipe with the cat and resonator as all one piece. When that broke open it threw the P0301 code and a P1174 code and the P0446 code went away.

So far I have replaced the cat, the spark plugs, the mass air flow sensor, and the fuel injectors. I only have code P0301 now and you can feel the misfire while driving it. We checked the fuel pressure last night and it was around 60 psi while running but 0 psi with key on engine off.

I am at a loss as to what else to do. All suggestions are appreciated.

Thanks,
Jessica