Trying to do a quick leak down test on ONE cylinder only. I took out just that spark plug only (to save time), got it to TDC, then turned up the compressed air. Is there any reason I have to remove the other spark plugs? (On a compression test that may be different, but I figured if it leaks by with just no spark plugs in it will still leak by with all but one in.)
It may be a little harder to turn the crank, but would the results be inaccurate for any reason?