for some reason i dont know whats happening, last night we went cruising and of course race , the car was running best no idle problems.this morning i was going to buy cigarettes,ran into a silveradoV8. it got me excited.so we went on the stop and I left it on D4, not bragging i left him 4 cars on 2nd gear no launch. when im on my way home idle going low about 600 and when put it on D4 it chokes in low rpms.its weird i thought i fix it already...help guys.test and tune is coming on march1st.