It was the cat. As I cannot read the codes in that car for some reason, I was reduced to guessing. I guessed fuel pump. I was wrong. Where I live (Pacific island) there are lots of folks below the poverty line. No money is spent on parts that can be avoided. The mechanic I eventually took it to just cut it off and put a straight pipe in without asking me. Anybody who would buy a cat when you can do without it would be regarded as a fool here. Oh, well, there is zero air pollution here, with or without cats. Is not having a cat going to be harmful to the engine? If it's going to cause problems I will go ahead and buy one.