started the car up last night and it ran fine then after about 2 min it started sputtering and it had high idle i let it down on the ground and brought it to the end of the street and it had absolutely no response to my throttle it would just sputter harder. im on the stock ecu right now the obd1 p72 is coming soon but for now i ran it on that i think its a vacuum problem or possible a iacv problem what does everyone else think????