Uh, The distributor cap will sometimes stick in the spring loaded button on a new one, noticed after a new tune up. Sparks but with not enough sting. Put your finger on the inside button and push back and forth, if its sticky, replace. DJM

was just driving along friday the 13th when all this cr*p happened. put new coil and condensor and set timing and synchronized k-fish, etc.....but pulling 2 and 3 and no difference....and yes, they both have spark.....i'll set valves in the morning but i think i've got a blown H.G.......no smoke or anything but what else could it be? stuck valve in 2 cylinders at the same time? doubtful. will try comp. test later tomorrow.