Antonio Garcia wrote: > The zero compression reading on #4 leads me to believe one of the > valves dropped or partially dropped somehow. If so, could I just swap Pull the valve cover. Sounds like a rocker got ejected or shattered. When the car runs does it backfire out the intake? RK -- Ray Kawski 1998 Sentra SE Turbo, 1991 NX 2000, 340K mile 1991 Sentra SE-R Poconos, PA