ok let me see if I can do this .....
- PARADE.JPG (42.05 KiB) Viewed 7688 times
close enough I guess. This is what I would have expected to see as a scope trace on ths vehicle. Schematic shows this as a distributor engine so this is how a normal parade trace would look. Notice the fifth cylinder trace. Low firing voltage,ragged burn time, no distinct cut off, no coil ring. Firing order 18436572 this would be cylinder #6. Keep in mind that at 600 RPM, this trace repeats five times a second. At 3000 Rpm, 25 times per second. sometimes you gotta look through several traces to find an intermittent misfire. The image that you uploaded showed either a bad ground reference on the scope *OR* a bad ground in the ignition. Needless to say, the image you uploaded was not a viable reference. Thats why I was curious to see the "after" shot. If in the course of replacing the lifters you inadvertently fixed a bad ground in the ignition, you still wind up with problem fixed, but was it really the lifters ???
Measure it with a micrometer, mark it with a piece of chalk, cut it with an axe. Sand it to fit.
