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If the brakes feel " Tight" then there is a fault with the brake servo/booster. Get a tech to check the hose and connections of the servo because any split in the servo/booster hose will affect the intake manifold vacuum and cause poor running. Fix the servo line and it will probably fix the main problem as well. May only be a clip want tightening. Get a knowledgeable person to help if you are not sure yourself.
First Check All Air hoses. Make sure no vacuum leak are present.
make sure your ignition coil are good. This will make engine idle roughly. For the rpm to high or to low maybe your air idler is no good. If you're car turn off it might be overheated. Check coolant level. Make your not mixing water with oil. Check the oil dipstick to verify. If like a milky color then it's mixing water with oil. This will car to stall and run roughly