Cbr954ryder

If this is the wrong place to post this please let me know. But I recently bought a 95 4Runner with a 22re and 5 speed. It runs great up until it gets hot then it starts to idle really high and when under load it seems to be cutting out. Gets better the higher the RPM's are but still cuts out. The guy I bought it from said he thinks it may be the TPS because he replaced it with an aftermarket one and not the original denso. Any help would be much appreciated.