4A-GE MK1 Engine Running rough

4A-GE MK1 Engine, rough, start, 4,000, idle, mins, finally, drive, running, sputters, work, hard, kinda, pulls, sputtering, feels, normal, acceleration, 1,000-4,000, cylinders, idles, ideas, times, valley, sparkplug, cleaned, sparkplugs, brand, looked, shut, constant, freeway, speed, 60-65, fine, runs, toyota, 1986, stock, starts, back, city, starting, backfires, cranking, idling, notice, stoplight, roads, stable

I have a stock 1986 toyota mr2. So i go out to start the car at 10 am to go to work. Starts up and runs fine. Drive onto the freeway with a constant speed of 60-65 mph for about 25 mins. Finally back on city roads. I get to a stoplight and i notice that its idling quite rough. The idle is not stable. So i drive it for another 5 mins to get to work. I shut it off. Then try starting it again. It has become very hard to start and backfires. After cranking it over many times, i finally get it to