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Randy..... ...your son is semi-right, low compression. But as a general rule, carbon falling into yer cylinder is soft (otherwize it wouldn't have fallen in) and usually gitts blown out during engine re-start. FIRST THING, do the dreaded compression test, dry & then wet. Ford specs: 90psi min (dry). The wet-test will evaluate the condition of the rings (worn from carbon?) Normal worn engine compression will increase +20psi over dry reading. really worn engine will increase +40psi over dry and is canidate for rebuild. No increase over dry, burned exhaust valve. Now your semi-ready to make the rebuild decision. Do you remember yer oil pressure numbers? Low 10psi? Normal 30psi? ME? First thing I'd do, is make certain the rings aren't stuck. $10 can of Marvel Mystery Oil can save an un-necessary $1500 engine rebuild. Read the instructions on the can of MMO. Basically, you pour a couple of ounces of MMO down the sparkie hole and lettitt set overnite. It will drain thru yer rings and un-stick'em. Then re-doo yer compression tests. Iff'n dry compression doesn't increase (and I'm bettin' it will), now yer a canidate for new rings/overhaul..... ....respectfully, Dell
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