I have a1995 Grand cherokee with v 6 4.0 L IT run when it's cold but when it get's warm up it stop's running what can do. .

Find the egr valve on the intake. It will have a vacuum line connected to it. Start the car when the engine is cold and let it warm up. As soon as it begins to die, disconnect the vacuum line from the egr. If the engine no longer stumbles and holds idle, replace the egr. Basically the egr is the exhaust gas recirculation valve. It lets the engine re burn exhaust gas.They tend to stick in one position after time from carbon build up.