Glenn,

Fuel leak is probably he injector fuel return lines. If that's the ones U replaced, Maybe they aren't on tight. Try putting some engine oil in the hoses before U push them on the nipples.

U probably have a vacuum leak. After the engine is run long enough it makes enough vacuum to shut itself off.

So check the vacuum at the brown vacuum line going to the IP shut off. Check it both hot and cold. If the shutoff device is working, U should be able to shut off the engine by sucking on the vacuum line with yout mouth. If U have a mityvac, that will work better.

P E H