My mom just got a new 05 corolla le, and gave me her old 93 corolla 4a-fe 5sp. Its got 150,000 miles, and runs pretty good, it was well maintained. It recently got a new clutch, and cat. I can tell that until its warmed up as I accelerate in 1-3 it lags or hesitates at certain rpms. I think it mite have something to do with the fuel system, but I don't really know. Anyways I want to keep it in good running conditon and was wondering what I should replace to keep it running strong. I was thinking one thing to replace would be the timing belt and spark plugs and maybe plug wires. I got a toyota factory service manual on the way for it so I'll be able to replace things a little easier.