Spongy brakes are or no brakes With p0304 and p1684 codes and check engine light

What is your question?

Problem started about a month ago. CruIse control Actuator isn't mounted fully. It's missing I nut.. I just replaced PC valve. Replaced pcv valve hose. Air conditioner don't work. IT miss fIreS, brake dragging entire car to a complete stop with accelerator pushed to the floor. Knocking or pinging when accelerating. IT comes and goes. SMelling exhaust and gas inside car every time I start it and turn on heater or just fan. brakes just quit. Or sometimeS hard. I pulling to the left when hard braking.

What makes this problem better or worse?

Nothing really. I it's getting worse. I p0304 code came on..

How long has your 2001 Chrysler PT Cruiser had this problem?

1 month