m22racing1
New member
i have a 94 gmc 1500 w/ a 350 tbi. i have replaced the o2 sensor, map sensor, egr valve, throttle position sensor, idle air control valve, tbi gasket. sometimes it will run good for about 15 minutes and then it will start running rich. when running rich it wants to die coming to a stop and doesn't want to idle at all. PLZ HELP