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Q:

Could this be a Throttle position sensor problem?
Or something else. on 2001 Chevrolet Blazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
idles rough, RPM fluctating , vehicle has stalled at stoplight but restarts right away.
(2) Answers
it could be many things. but you can start by replacing fuel filter if over 2 yrs since last filter changed. need to check fuel pressure and check fuel pump.