This neighbor of mine has an '88 LeBaron turbo and she flagged me down yesterday because her car was running like crap. It was running on 3 cylinders and when I pulled the plug wire for number 3, nothing changed, but there was good spark from the wire to the plug. Also...when revved to around 1500 RPM, it knocked really bad from the top end.

I'm guessing that she lost a rocker arm on 3 and it has no compression....sound like a safe bet? I'll pull he valve cover tomorrow and see what's up for sure.