[K204DR]

got a 180 pump, that suddenly decided it didn't want to idle. it would run if you kept your foot on the throttle, so we drove 1.5 hours home. i can adjust the idle up to 1000-1100 and it will run. any ideas? nothing I can find wrong with the gov springs. just got done looking there. protrusion is 052. very strange. its not a fuel flow issue as it has tons of power, just won't idle. we changed the filter just to be safe and it was all clean.