This is the chart form my 93 Ford F150. The waveforms are supposed to be aligned vertically (I've been told). What would be the most likely cause of this type of problem? I've had a problem with an engine mis at cruise when the engine is under light load at lower rpms.
The mechanic said that the distributor was magnatized. I had the post on earlier this week under the title "Distributor magnatized???".

Thanks

 

Adding this reply to get the post back to the top of que.

Thanks