How does the engine crank? Does it crank very rapidly, much more than normal? If so, you may have lost compression from washing the rings out from the engine flooding.
If this is what happened, you can often get it started by holding the throttle wide open (which shuts off the injecotrs) while you crank. In extreme cases, it helps to pull the three front plugs and squirt a little oil in each cylinder to build compression, put the plugs back in and then try cranking again with the throttle wide open at first then back off a little after some of the oil has cleared.
It should be obvious that the engine is cranking too fast. If in doubt, it is probably something else.
It could also be stale gas. If it is, you may not get it started without squirting some gas or ether into the throttle body.
I had a problem with a pin in one of the wiring connectors that drifted out and shut off the injectors. It was one of the wiring connectors on the right side of the engine. The connector was defective and did not hold the pin properly. I don't think this is a common issue though.
There is always a slight posibility that either the crank or cam position sensors have failed, but this is probably very remote.
Good luck.
