URQ quirqiness

[DGraber460 at aol.com]

I now believe I have a car that is demon-possessed. Nothing else makes  sense.
The "quirqiness" issue I had thought I had solved. Early in that saga, I  had 
suspected silicone vapors from some lube I had used on the charge hoses was  
messing with the O2 sensors. After trying everything else I took all the  
charge hoses off- cleaned them with gasoline and reinstalled. The "quirqy" duty  
cycle issue appeared to be gone for the last 2 weeks. Ran fine no  issues or 
problems. I was truly enjoying the car again.
Then today about 2 miles from home it drops a cylinder. No noise, no  fanfare 
just starts running poorly. I get it home, and it idles but very rough.  Shut 
it off and pull the plugs thinking I will find a black one. No such luck.  #4 
& 5 are slightly more of a battleship gray than the first 3 which appear  
normal. Very odd. Pull the compression gauge out and to my horror #4 & 5  don't 
even bounce the gauge. NOTHING! Pull the valve cover thinking I must have  
broken valve springs. Nope. They look normal. Timing marks all look to be fine.  
Looking into the bores they appear to be OK. No valve train parts or anything  
out of the ordinary, and the valves appear to be straight as they open and 
show  themselves at the spark plug hole. The oil is clean, up to full and with no 
 apparent grit or other issues.
What the hell is going on here? Even a blown head gasket between cylinders  
(or elsewhere)would make the gauge at least bounce. If it bent the valves, how  
the hell did it hit them? Broken rings etc. would also still register  
something.
This happened just driving along at about 50 MPH, and I have not pushed the  
car hard at all for some time.
Somebody just shoot me and get me out of this nightmare. 
 
Dennis
Denver