hi This is my first post :) I also have this loss of power when the engine is loaded in 3rd or 4th gear. The engine appears to drop into limp home mode, with only about half power. Turn ignition off then on and its ok untill the next time. I have had it connected to a code reader and it says "Manifold absolute pressure". garage suggested to replace the MAP sensor. Went to fraud they werent sure which part it was as there diagrams show two components in that area both listed as just sensors. Coulndt tell me which one was the map sensor. :( Anyway looked on the internet and found this great site :( After much reading of posts on this subject most say to check the vacuum pipes for splits, loose etc first, as any problem hear can cause lots of problems. Checked mine all were practically disintegrating, the cotton sheath goes to dust when you touch it, where they have rubbed against each other they are wafer thin. So I am going to replace them all and see how it goes. Ford says the two sizes are 3.5mm and 5mm. reading suggestions from other posts I have just bought some silicone hose from ebay 3m of 3mm and 2m of 5mm, cost me