when i come to a stop light the idle just drops to were it wants to die but it does not die at all put when i turn my heater off then on it jumps my rpms up but then when i got take off it hesitates bad until i get into higher rpms i really dont know what it would be i put a new o2 in a new iacv i have new rings im gona put in it soon but im waiting to see if i want to change the head out or not becase i think the vavle seals got messed up when someone put them in

so i really dont know what the deal is im not throwing any codes at all

 

compession test it and it sound to be electrical if your heater makes your rpms go up

 

iv done a compression test its 180 all the way across