I think we need a little more info, but no resistance? Are the plugs out of it? The only thing I can even guess at it a head gasket. Or all your valves are bent. Depending on the condition of the rest of the car, it's probably worth a rebuilt engine.
Guitars: Epiphone Les Paul Ultra; pretty red Squier Acoustic;
Amps: Vox VT30;
Pedals: Dunlop Fuzz Face; Dunlop Crybaby Wah
My kids have: Squier Affinity Stratocaster MII; Fender G-DEC; Squire Acoustic; Jay Turser Strat-copy, Roland Cube amp
"I am a sworn enemy of the saccharine, and a believer in grace over karma." Bono 2001