Stable Idle, rough engine, Gen III injectors (M30)

[nm735]

Hello,

I recently had some trouble with my 735i bucking at all speeds. It was likely the injectors. The new injectors are from a Ford Explorer. The engine is now idling normally, but the engine shakes. Also, my check engine light comes on, and the Peake tool says it's an emissions issue. I haven't had the chance to hook it up to the computer yet, and I don't think I will for some time. When I stab at the pedal, it almost stalls. Between the shaking and the trouble with sudden pedal input, I want to say it's a vacuum leak. However, my father thinks it might be the new injectors, as they are of a slightly higher flow rate than the stock ones, and he says that it might be getting too much fuel. However, it does not appear to be running rich. With the old injectors, it was clearly running rich. Personally, I am worried that I did not properly tighten up the intake manifold, and that the vacuum leak is on the manifold.

Is it possible that the new injectors are causing this trouble? Additionally, what are the symptoms of a manifold vacuum leak? Are they unique, or do they just look like any other vacuum leak? I'd check with carb cleaner, but I am currently away at school.

[shogun]

did you compare pressure and flow rate of original and the Ford Explorer ones? Original pressure for the M30 needed is 3 bar, no idea what the Ford ones need http://users.erols.com/srweiss/tableifc.htm

[nm735]

It matches. Just checked. 0-280-155-710 Is 18.25 at 43.5 PSI, 0-280-150-714 is also at 18.25 at 43.5 PSI.

[shogun]

Then I would check for vacuum leaks and also the fuel pressure regulator. Pull the vacuum hose from the fuel pressure regulator and check for fuel inside the hose and see what changes in idle with vacuum off.
Here the vacuum hoses http://www.nmia.com/~dgnrg/hose_map.jpg
If you can make a diy EVAP smoke machine , leak detector tester, the better, there are some youtubes in the net, something like this https://www.youtube.com/watch?v=2U5kFib1WxE