My 1990 acura integra rs i recently fixed the fans bran new radiator the is a minor leak by the thermostat but my cars rpm are unstable bellow 1 in the idle postition the pgmfi was aciidently unpluged from the right side tube the single and the car rpms wen up n car went off so i put the lose tubeing together n noticed unstable rmp and white smoke sources say it might be from the radiator or does the pgmfi have to do something with the white smoke coming from the mufller ?