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Could this be a Throttle position sensor problem?
Or something else.

(2001 Chevrolet Blazer)
in Sweet Grass, MT on April 25, 2013
idles rough, RPM fluctating , vehicle has stalled at stoplight but restarts right away.
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Popular Answer
on April 26, 2013
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.
on April 26, 2013
Check the EGR valve. I've seen carbon keep the valve open causing rough/surging idle and stalling
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