Idle problem!!! HELP!!

[fax0815]

Might be the thing beneath your throttlebody (forgot the propper name) close the big hole on the bottom just in front of the butterfly when the engine has operation temperature, if the idle drops to normal the bypass valve is stuck open, you can try jet cleaner, but a 2nd hand one usually works better.
Common problem on 4 AGE´s!

Timing set right?
Air leaks somewhere, you´re running stock Intake manifold?
Check with spraying brake cleaner around the manifold, if it revs more, there is a leak somewhere...

The broken gauge doesn´t have anything to do with it, unless your termostat is stuck open and the engine does not reach any temperature, but even then it should move somehow
The sensor for the gauge sits on the front top outlet with one wire going from it (they´re about 10Euro new), while the engine temp sensor sits on the back of the head (green plug)
But I supose its not broken.