1991 saturn sc engine bogs down at easy throttle will come out of it if u step on it. then wont idle when u let off to stop

SOURCE: Idle surges after warm up and when brake pedal is pressed

1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue

SOURCE: saturn sc 95 idle is not stable/ going to die

you might have carbon build up on the throttle plate, take your breather off, spray the heck out of it with some carb spray and also down in the IAC really good. The when you start it, you will have to floor it until all the black smoke is gone. Then take it out on the highway as you are in a Nascar race.
Also your egr valve might be stuck open, and even a intake vacuum hose leak. you EGR being stuck open with cause you a rough or if any take off. Take the EGR off and check it for carbon build up also, if so try to just scrape it off. If thats not possible, youll have to replace the EGR valve, those on that car vary around 130.

SOURCE: 1991 camaro bogs down

Adjust idle speed back down
Clean fuel filter and check fuel pump

SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.