93 suburban idles smoothly but stalls at idle at stop light on occasion
will start every time with ether but occasionally on its own.



replaced fuel filter 2x
ran fuel injector cleaner with quarter tank of gas
higher than idle so it wouldnt stall
ran tank dry
replaced fuel filter
20 gal premium

any ideas??

 

Not sure if this truck has one, but my guess is the IAC (idle air crontrol), is probably shot.