Running Rich and Barely Any Vacuum... Bad Sensor?
Hey y'all, looking for some help to a complicated problem
Recently me and a friend discovered where the downpipe connects to the manifold the flange was half connected because one of the bolts fell out, reconnected it and everything seemed ok
2 days later, the cat was glowing red and broke, clogging the exhaust. Replaced o2 sensor, cat and muffler hoping to remedy the problem. Fast forward to now, haven't driven in a week because car idles anywhere around or below 1000, exhaust fumes smell insanely rich, new cat glows red after 5 minutes of idle, and vacuum pressure hangs around 5-10, any help would be appreciated. Thank you