Just traded my old hatch for a new one with a ZC swap. Ran fine for a bit and all of a sudden it shat out blue smoke like a bastard and started bucking, it stopped and no more blue smoke but wouldn't rev higher than 3200 rpm. Came back few hours later and it ran mint. The only thing else i know is wrong with it is loose battery terminal and i think a thermostat problem, car does not heat up at all. Blows semi warm air n that's it.