Originally Posted by
Bailes1992
If you disconect the MAP sensor the car will hunt for idle.
Also the engine has a little feature where it holds the revs for a split second while you change gears to make it smoother. Disconect the map sensor and you loose this feature, you WILL notice it. You will be kangarooing everywhere if you have gotten used to it too
The holed vac pipe was messing with the idle, and as I rarely drive her car I must have compensated for the gear change function. Hence I didn't notice any difference.