What could possibly be breaking down after the car warms up ?? The coil is new, 02 sensor new, thermo-time, yellow top (cant remember proper name) sensor, both fuel pumps....... I havent replaced the sensor that comunicates with the ECU yet tho, wonder if its breaking down ? If I disconnect it the engine will miss real bad. Engine starts and idles / revs great when cold. If I drive it up and down the street and let it idle and give it throttle it stumbles ????