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My Honda civic recently just started having a issue with starting and staying on. As it starts it blows out some white smoke, but after a little gas giving it starts up and zero white smoke. The RPMs will go down to let the car idle, but as it goes to idle it kinda bangs and bounces as if it's clogged or suffocating. After 3 sessions of that, it will stay on fine. The only problem is the car acts suffocated when I drive up to 2K RPM, past that it's ok. Can someone help I have changed the 02 sensors, cylinder 2 had a misfire but I changed the spark plug and now it's gone. I had a EVAP emissions leak code but that went away after all this.