[Christ]

Originally Posted by orange4boy

Thanks for the alert! That's a good point. It may be too late for my Previa but now I know. Luckily, I mostly drive a Prius now except for deliveries.

In a fuel injected engine, don't the injectors stop the second you turn off the ignition? There may still be some un-burnt fuel coming in at the last second though but surely not for the whole spin down.

Can this be observed with the MPGuino or scanguage?

Yes, they do. As soon as you cut power to the ECM, the injectors stop working, which means that there is no fuel being injected at all into the engine.

His Civic FE was/is carb'd, and unless he can find a way to close the venturi, it will continue to suck in fuel as it is spinning down. He shouldn't be shutting the key off until the engine is at idle, because all that extra unburnt fuel gets into the cylinders, flows past the rings, washing the oil film down, and mixes with the oil. Eventually, it can also wash the crank/main bearings and seize/warp the lower cradle. (The part of the block that the crank bolts into.)