fix that ground!! that being said, yes, you always take a zero reading on your meter and subtract that from your readings. usually, if its fairly high, like half an ohm or more, its a good sign your battery is almost dead in the meter, but some meters just read high with a fresh battery. the cap can still work, even though it reads bad, but usually has a drop out at idle. it still needs to be replaced, as it will keep burning out the break in the cap till it does become a problem for that cylinder.