Hi guys I am having a problem with my 88 four cylinder manual mustang I have replaced just about everything, fuel pump, fuel filter, map sensor, o2 sensor, tps, coil, fuel injectors, ok now for what the problem it idles fine but when you try to drive it when it is warmed up the rpms drops to the point of stalling out unless I push in the clutch to where it idles and then it idles fine until you try driving again and then it does the same so im hoping someone can help me out I am out of ideas and I also ran a test and I got the code 11 but I also got code 34 not sure what else could be wrong need help plz