hey guys i got a '97 ford ranger extended cab 3.0. i have a problem with any cold start. unless i let it idle for about 20 mins or so and warm up it wont pull off. motor idles really low and wont come off idle. it doesnt matter if its a hot or cold day. its 5 speed and its really boggleing me. i changed coil packs and the crank and cam sensors but it still has this problem. any ideas????