1.my idle is jumping from 1000-2500 and when i start my car it revs to 3500-4500 for about 10 seconds and drops and starts to jump. i cant determine if it is the TPS or the IACV. 2. when i reverse it seems like my axles make a clicking noise. but only in reverse. i will give rep for help. and also my civ is LS swapped