[solex3274]

After replacing a number of old rubber hoses under the intake manifold this winter and putting it all back together, the idle surges to 3000 rpm when started then quickly stalls out.

The following has been tested:
1. Tomming belt correct, all marks line up.
2. Compression test, all four look good.
3. Wires and cap on right, spark to all 4 plugs
4. Did not do a fuel pressure test, but pulled the rail and cranked the engine. All injectors spraying nicely.
5. Plastic vacuum hoses all connected

I think the source of the problem lies in the manifold area. How do I test the Idle speed Control valve and the Air Flow sensor to see that they are actually working? Any suggestions welcome.