Been asked to take a look at a colleagues 2.3 but even amongst a few of us, without tools, we were struggling to find the fault. It has really rough idle (still keeps itself running but sounds like 700ish rpm max and then when given a blip of the throttle it revs high and constant for a fixed period, then drops again). Its been in a garage and they couldnt find the fault but didnt sound too clued up to be honest. They did a diagnostic on it and it came up clean which is odd. They went through the whole intake side of engine and couldnt find a leak but having blown gas over the exhaust area the revs raise and smooth out. I couldnt reproduce this but it was witnessed by the owner. One thing i did notice was the fact that there is a loud vacuum leak noise near the timing belt end of the exhaust manifold. Assuming it is the EGR but dont have a diagram for it so cant get my brain around the pipework and what looks like vacuum pumps over the passenger side of the bay.
Any hints welcome while i dont have the diagrams at hand, its nowhere near as simple as the egr on my engine, in fact im fairly sure the EGR system on the ford has more hoses than my entire vacuum system :D
Ta