[1934]

('37 FH motor)
When I short out the plugs with the motor at idle there are 4 cylinders that seem to be doing all the work and 4 that seem to be doing nothing. I.E. when I short out one of the 4 good ones the motor bogs down considerably and when I short one of the other 4 there is no difference in the idle. I thought it might be the plugs so I switched them up and no difference- always the same 4 cylinders not firing properly.
Does this sound like a timing issue or.... Any ideas appreciated.
Doug.

Sorry, just realized I meant to put this in the early V8 forum.