The cylinders were flooded with antifreeze. It all happened so fast, the car was idling in mydriveway, began to stumble, blew white smoke then died. The engine cranked for a second then nothing. Radiator and overflow were empty.
My father and I spent the last three evenings tearing the car apart to replace both intake manifold gaskets. While we were in there we updated the upper manifold to the newer design. We numbered all the sensors, grounded the coils when cranking the engine, took digital pictures before taking it apart, used sensor safe cleaner, etc etc no cutting corners here. So when we got around to starting it theres nothing but cranking and the occasional backfire. Fuel pressure is there (according to the nipple on the fuel rail), spark is there too. Fuses are good. Wires are ran correctly.
Personally, I think we fried the ECM by cranking the engine. I did take the time to ground the coils as we cranked it to get the antifreeze out of the cylinders but I don't know what else it could be. Something else- I started the car while the OBD scanner was plugged in to the diag port; did that hurt anything? Any ideas???
Car is a 97 SE with 70k, btw.