pull all 4 plugs
unplug distributor pickup plug(s) - this shuts off the fuel injectors
bungee or otherwise hold throttle WIDE OPEN
put a battery charger or jumper cables on to prevent battery from draining down during test (which would make readings at end of test lower than tose at beginning)
for each cylinder, let engine turn over for 3-5 seconds or until gauge stops increasing
repeat each cylnder 1 or 2 times to make sure you're getting a good number
add 2 tablespoons oil to each cylinder and repeat ; if (previously) low psi numbers jump up that suggests worn rings in that cylinder
of course even better is to use an actual "leakdown tester" but most of us dont have this tool ; however your friendly neighborhood mechanic prolly does
There should not be more than a 10% difference between your highest and lowest cylinder readings. If one is excessively low- look for ring or piston damage, or a valve train problem. If two adjacent cylinders are excessively low- look for blown head gasket. All cylinders being low- a tired engine that's ready for a rebuild.
now i know that it's not the HG or the pistons because i just swapped that thang lol :bash: might be the rings then? oh well, i think i'm gonna measure again once the alternator is reconnected so the batt doesnt get too low, it's crap xD
this time i will use some oil on another try to see if it makes any difference.. if the oil helps increase comp, this would indicate bad rings, right? do you just add some engine oil like 10w40 or so?
and also, what's that leakdown test if you would be so kind and explain to us
sorry glhx for jacking your thread there, but might be some help for you too anyway
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