Recently had a fuel pump go out on my e36 318i which I replaced. Car is running better than it ever has, until last night. Driving down the interstate and all of a sudden a jerk followed by major loss of power, surging and rough idle. Look under the car and the catalytic converter is glowing red hot. Well, took it home and took exhaust off and tried starting the car with no change (eliminated clogged cat). What would be the next step?