Hi Dave,
I doubt that the small amount of water that escaped would cause a problem...unless you "hosed" it down very well & then your starter would be the likely victum. I do believe that after you let the car get to "closed loop" & scan it your numbers will not be like the numbers in the Helm manual. There is a page in section 6E, "Driveability & Emissions", and it shows you what the numbers should look like for a properly working motor on the scan tool. That's what brought me to the primary injectors being at fault in my case.
If you have a 90 or 91 it's a good bet that the ethanol in our gas has finally killed the injector coils...they weren't designed to resist ethanol like the 92-95 injectors were. Call RCEngineering.com & get a set(16) of their S/S injectors & don't look back, about $68.00 ea. I know it's a bunch of cash but they work great.
...welcome to the Fraturnal Order of the Knights of the Pulled Plenums!
Oh, while you're under there you may want to check the breather box gasket & hoses and eye up the 2* vacuum hoses and associated parts....test all the vac lines & actuators & the 2* control solenoid, ohm up the coils & wires & clean up the valley & drain tube....you know the standard house keeping for under the plenum. It's not hard to pull but the gaskets are expensive so you might want to consider giving the once over to everything that lives under there just so you don't have to make it a habit. Just a suggestion!
Tom