A few questions about my family's 2000 ES300 and 1992 SC400

2000 ES300 [334k km] 1MZ-FE V6 Automatic

A weird rattling sound appeared about a year ago, I thought it was the Catalytic Converter but my father thought the car was slowly dying. About six months ago, a check engine light came on. My family took it to the Toyota dealership to get a diagnostic, and they said the Catalytic Converter was worn out. My father doesn't think it's worth fixing and would much rather save up for a new BMW (which I am begging him not to do). The check engine light went away for some reason after awhile. I am planning to replace the cat myself but it has me wondering, is my father right? We bought the car for 35k CDN used in 2002 and my father took very good care of it, no parts have had to be replaced except the battery, timing belt and transmission gasket. We befriended the chief technician at a Toyota Dealership and he gives us very good deals on fluid changes and other maintenance. Is this car worth fixing? Are there any other problems I could face with this car? I want to inherit it, it holds a special place in my heart.

1992 SC400 [314k km] 1UZ-FE V8 Automatic

The problem with this car is that whenever we turn the AC on in Drive or Reverse, the car stalls. I think I have narrowed the problem to the IACV but haven't gotten to confirming that. I cleaned the MAF sensor and ThrottleBody (which was really dirty) and forgot to reconnect the vacuum hoses to the IACV and tested it without it, the AC did not stall the engine but when I reconnected it, it stalled. Our previously mentioned friend technician said he would just live with it, he was the one who sold us the car for a killer deal of $2500 CDN after our 2005 Nissan Pathfinder's transmission broke on the highway and we had to scrap it. What could be the problem? Also, what are some problems my family could face in the future with this car?

P.S. I also wanted to know what fuel system cleaner would you recommend for these cars? Especially the SC400 since it was really dirty. BG44k? STP? Gumout?

Best Regards, Seb

Comments (1)
No. 1-1
Scotty Kilmer
Scotty Kilmer


it's worth fixing, I've seen em with 500 thousand miles on them. Odds are the ac compressor is worn. If it only stalls on idle and not when driving, i'd live with it or put on a new compressor