Saturn Repair: High Idle + Cyl 1 misfire, 2002 saturn sl1, vacuum leak

Question
I read your answer to Mitch on 4/21, I have similar problem and would like confirmation on the following:
DATA
2002 Saturn SL1 1.9 SOHC
1) Idle very rough at 800 rpm
2) Misfire code for Cylinder #1
3) Replaced Plugs, cables, ignition coils sequentially.
4) Now idle at 2000 rpm smooth + Misfire Cyl 1
5) Checked with gage,No vacuum leak
6) Compression = all 4cyl at 180psi
6) Cleaned throttle body of carbon
7) Removed and Cleaned IAC valve
8) Probed Gr/Bk and Gr/Wt wires coming from PCM to IAC looking for fluctuating 1.5 to 10.5 volts, BUT reading a constant 11.8 VDC
9) Started the car with IAC 4 wire plug disconnected (rpm = 4000)
10) Connected plug to IAC rpm dropped to 2000
11) I pushed on the IAC plunger to see if had any resistance and it seems very weak

Questions
Did I break the IAC by pushing on it?
Does the 11.8 VDC mean that my PCM is bad?
Will the power reset procedure that you described to Mitch fix my PCM if it is just scrambled?
Why do I still get a cylinder #1 misfire?  A bad mix should cause all cylinders to misfire.

Thank You very much for your help.  

Answer
Jerry,
 Due to your remarkable detail and amount of information, I can comfortably say that you have an intake leak at the #1 intake port.  Verify with carb/choke cleaner sprayed directly on top of where the int manifold and the head meet.  You will find your problem right there.  The intake gasket is only paper, and you will probably find it curled up and leaking.  Before you do that, (on many Saturn SOHC engines set up for California emissions, but not equipped with) there is a vacuum port between the #1 and #2 cylinders on the intake manifold.  They come from the factory with a plug over that port, sometimes the plug comes off, causes a high idle and misfire.  That was just an afterthought, and possibly a quick fix.
 I know it probably doesn't seem likely that you have an intake leak (good job on vacuum leak check, by the way), but I'd bet you dollars to doughnuts your problem lies there.  That would explain your high idle/misfire.  If it was a simple misfire on #1 I would tell you that sometimes the injector signal wire for #1 gets chaffed on the injector rail mounts.  You might want to check that too, but I'd say your problem is in the manifold gasket.  Hope this helps, and let me know how it turns out!

Chris

P.S. The procedure that I described to Mitch is for a fluctuating idle without misfire (pulsing caused by the IAC not keeping up with the PCM)