fiesta idle probs
hiya im new to this forum and im hopeing someone with expert knowledge can sincerly help me out here. i have a 1.3 mk4 fiesta hcs efi. the problem is that when i pull up at a set of lights it starts to rev high and when i coast along it will hunt untill i come to a stop. i have replaced the iscv and the tps and also have replaced the breather hose assembly all with new parts from my local ford dealership. i have removed the throttle butterfly and heve cleaned that too. if i disconnect the iscv the engine will work ok but it lack some power. the car feels like it wants to move along on its own like as if the accelerator is sticking but i know this not to be the case. if i disconnect thge speed sensor it doesnt hunt whilst coasting. ( i dont coast just does it when i do) please someone help befor i get tottaly whacked with my car. i love the little thing and it has served me well for some time now. help.