My stock smog pump siezed up on my 84 3.8l regal. Car ran nice after an engine overhaul for about 40k miles! . Really nice. But I lost power due to exhaust restriction in my cat converter the other day. I ran it daily for about 4 months and then the exhaust restriction. Could have my siezed up smog pump cooked my cat converter? I’m going to replace my smog pump and car converter . But what other systems should I check so I don’t cook this 350$$$ cat converter too?