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Okay, the car has gottne a tune up a month ago and run fine. New plugs, wires, dist cap and rotor, oil change, air filter, and cleaned the MAF sensor with a special cleaner spray. So today I drive to my 1st service call fine, then on my way to my second the car starts decelerating and loosing power. I limp it home 5 miles and it can't go above 2k RPM. Put it in nuetral and won't rev above 2k, just sputers. I turn the car off, then right back on and it revs fine. No engine codes, but when I open the hood steam is spewing out of the overflow coolant bottle. I am waiting for the radiator to cool down a bit now so I can check the level, and add if neccessary. Any ideas, I cannot find my Haynes manual anywhere. No engine codes or CELs have appeared. Need help asap. Thanks! ! ! ! ! ! ! !